Am I abused? My dad threatened to kill me? What should I do?

I'm sorry:( it seems like emotional abuse mostly but somewhat physical abuse too. I would suggest talking to your friends about it so they can help you to find help. Try talking to any sports coaches, teachers, friends, guidance counselors. Maybe talk to a relative so they can help you out and maybe live with them or a friend for a while. It will be hard but I know it'll all be good in the end. Try talking to some kind of family counselor. And they can help you out. Good luck