Answer:
I have feet on my head
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
I am so delicious that I require a house to contain me.
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
I go inside boots and outside shoes. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.