Answer:
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
I widen my jaws when you poke two fingers in me. I especially like to devour papers
I am owned by the poor, the rich do not need me. If you eat me, you will die! What am I?
I have green hair a round red head and a long thin white beard.
What has one eye but cannot see?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.