Answer:
I’m white; perfect for cutting & grinding. For most animals I am a useful tool.
I produce wool and spit a lot
I have a few points but we're not competing. I'll help you win when you're eating.
The more you take, the more you leave behind. What are they?
I am pronounced as one letter, written with three. I come in blue, black, brown, or grey. Reverse me and I read the same either way. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.