Answer:
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
I wear a red robe, with staff in hand and a stone in my throat. What am I?
When you stop and look you can always see me. If you try to touch you cannot feel me. I cannot move but as you near me I will move away from you.
What is black when you buy it, red when you use it, and gray when you throw it away?
What did the piece of wood say when he saw the screwdriver and screws approaching?