last summer me and my husband were looking at houses to buy and were in our house now and i remembered this dream a few days ago and it stirred me up a little i was wondering if anyone new what it meant

  dream
 
  me and my husband pulled up in our van to look at a house when we got out i saw a waterfall in the neighbors yard next to us and the colors of all the yards were real bright and vivid we then entered through the garage and i saw an old washer and dryer high up on a shelf then we went in the kitchen and i was trying to ask the Realtor how much  this house was but she didn't answer so i kept looking around and i came to one of the bedrooms and i saw an old lady then i realized she was a ghost i went in the room and when i look in the mirror on the dresser i saw her instead of me it really confused me and i went out and the to the basement the basement had mostly kid stuff and a door to the backyard when i went out i let all the cats outs like 9 or 10 and as i was tying to catch them the Realtor came out on the patio and told me they will get them later
      when we left we decided to drive by the school and there were allot of teens in the front of the school we drove threw them and one girl didn't see us and we didn't see her and we almost hit her as she was yelling at us for this her dad (who is my stepdad in real life)came and grabbed her and started yelling at her because it was her fault and pulled her away so we could leave

     the house was decorated in 70's furniture and colors
   

House - A house usually always represents you, or rather 'the self'...your body and the attributes of your personality.
They symbolize your emotional and psychological 'self'. All of your experiences, stages of development, and parts of your conscious and subconscious life may be represented by that house. The house may be representing issues concerning a particular dilemma in your life, or it may be more general and comprehensive.

Waterfall - Water generally represents the unconscious and the emotions. A waterfall is a positive dream symbol that suggests a cleansing of negative emotions or psychological issues. Just a simple visualization or a daydream of standing in a waterfall makes a person feel energized and refreshed.
If the waterfall in your dream is overwhelming or too powerful for you to enjoy, it may represent emotional energy and unconscious drives that are very difficult to effectively cope with on the conscious level.

Garage - represents a place for temporary resting of goals. A storage place for ideas or ambitions, or storing hidden aspects that unconsciously drive you in your waking life.

Washer and dryer - suggests things or tools you need to 'get the job done'. Because they were high up on a shelf suggest that the things you need in order to get through your day to day life are just out of reach, or that you may need to work a little bit more to achieve the goals you have set for yourself.

Kitchen - the heart of the house, and for most families, the kitchen is a place of warmth and nourishment (emotional as well as physical). Also symbolizes the 'mother role'..( pride in the ability, or a wish for the ability, to create a home and contribute something valuable to the family).
As a symbol for your emotional life, this is a place where you can be creative.
The kitchen almost always reflects the need to work through your current situation using your heart rather than your head.

Asking the price - suggests you are concerned about finances. Because she doesn't answer you suggests you feel you won't have enough to afford what you want.

Bedroom - Often the most private room, the hidden/private self, intimacy, sexuality, sleep, rest, the subconscious and feelings of wanting to retreat.

Old lady - usually the elderly represent wisdom, patience, guidance, and experience.  They serve as life lessons....to learn from their achievements, as well as their mistakes.

Ghost(s) - In general, ghosts symbolize aspects of yourself that you fear. This may involve a painful memory, guilt, or some repressed thoughts. You may be afraid of death and dying. Alternatively, ghosts are representative of something that you feel is no longer obtainable or within reach. It indicates a feeling of disconnection from life and society. This dream may be a calling for you to move on and abandon your outdated modes of thinking and behavior.

Mirror - symbolizes the imagination and a link between the conscious and subconscious. Also, your perception of yourself within the world around you.
Because you saw yourself as the old lady, suggests that you are pondering thoughts about your inner self. The reflection in the mirror is how you perceive yourself or how you want others to see you. You may be contemplating on strengthening and changing aspects of your character towards the symbolization for the old woman. That you are wanting to make better or wiser decisions.

Basement/Cellar - symbolizes the deepest part of your subconscious mind, your intuition, and your foundation (the beliefs, and ideals, that were 'built' in your earliest beginnings), also represents a part of your subconscious mind where you have kept your fears and problems hidden. The appearance of the basement is an indication of your subconscious state of mind and level of satisfaction.
Being 'kid's stuff' suggests you are thinking that you aren't a kid anymore. That you need to become more mature in your way of thinking.

Cats - as a rule suggest psychic ability, sexuality, secrets, sensitivity, affection, independence, intuition, emotion, jealousy, anger, stealth, or vindictiveness. They also symbolize a hidden side of ones own nature.
Being all different colors, it may suggest that you have been experiencing a lot of different moods lately.

School - A place of learning and knowledge, and represents life's lessons learned or not learned; approaching different levels of consciousness. This could mean that one has a desire to learn, or that one seeks higher ideals. If you are going back to school, it may hint at unresolved issues, or new learning opportunities.

The girl you almost ran into represents you.

House was in the 70's fashion -  it suggests that you would like to return to a more simple time.
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Are you having some financial difficulties lately....more so than normal?
Is there some goal you are trying hard to reach?
Did your step-dad give you advice but you didn't take it, but wish you did?
Is he blaming you for something you did or didn't do?
Are you trying to be more responsible, finding it hard to leave childhood ideas, or beliefs behind?

Hope I could help, good luck!