What Am I Riddles

Question: What beats but inflicts no pain?

Question: What white coat lights up and is hot to the touch?

Question: What's black, white, and red all over?

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

What am I?

Question: Within me you can find gold Also 'The Greatest', if I should be so bold. Unfortunately, as you might see 'The Worst' is also apart of me. What am I?