What Am I Riddles

Question: What is often picked but seldom chosen, never walks but can run when frozen?

Question: I don't like crackers and I don't drink tea. I just want to eat what I used to be.

Question: I shoot people and sometimes cut off their heads. What am I?

Question: What smells better than it tastes?

Question: You can not eat me until you undress me. What am I?