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. What am I?
I am the kind of food monkey likes and people slip on me and fall in cartoons.
I am the only thing that always tells the truth. I show off everything that I see. I come in all shapes and sizes. What am I?
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
I am a word. I become longer when the third letter is removed. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.