Answer:
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
I can be sweet or sour. I do not rhyme with any other word
What has legs but doesn't walk?
I contain six letters minus one and you got twelve.
I am a house with two occupants sometimes one rarely three. Break the walls eat the boarders then throw away me.
Give it food and it will live, give it water and it will die.