What Am I Riddles

Question: What goes black when you buy it, red when you use it, and goes white when you throw it away?

Question: Touching me is inevitable, I send chills down spines, yet none fear me. What am I?

Question: Living I do not exist. Dead I am an inspiration. You always doubt me. But never reject me. I am what is given from old to young. Without me people would not learn mistakes. What am I?

Question: I have 13 arms, 10 legs, 2 head, and smell like burnt denim.

What am I?

Question: What's wet and dry Takes you low Moves real fast And kills you slow ?