Answer:
I am bought by the yard but worn by the foot. What am I?
What do people spend a lot of money on every year, but never want to use?
Light hides me and darkness kills me. What am I?
small land in water.
I am a box which holds keys but not locks. With the right combination, I may unlock your soul. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.