Richie, I am so sorry you're going through this. My parents were like this too, only I didn't have the gumption to do a tenth of what you're doing and they had me firmly under their control until I was 25.
All of the advice you're getting is good. Either get a P.O. box or ask a friend if you can use their address as your mailing address. Direct deposit your check. Change banks if you have to, or split your check between your old account and your new one.
The next time you're "allowed" to drive your car, get a copy of the key made and keep it in a secret place. Each time you go out, take something with you and put it someplace safe -- a friend's house or a rental storage unit. Little by little you can move yourself out and one day when you take your car you can just go.
Also, if you have an inheritance coming to you, please get yourself a lawyer the instant you turn 18. There are legal clinics that help people who can't afford a lawyer's hourly fee -- call your local or State Bar association and ask about that. You need legal representation to make sure your mother doesn't try to do you out of your inheritance.
It's hard to fight through the emotional blackmail and see a way out, but you have several, so take a deep breath and prepare to live YOUR life the way YOU want! HAPPY BIRTHDAY!!! Oh, I know I'm a little early with it, but it's a-coming soon!
Hugs,
Nina