Follow up on that legal aid. You need a lawyer, they will know what evidence to collect, how to collect it, where to keep it. Consequently you'll know what and how to hide anything you may need to about yourself. They will know what, if any (hopefully none), legal rights he has, so you can avoid violating them. A good divorce lawyer should be able to tell you how to get your hands on any money you can legally, and how to hide it illegally (though officially they should advise against it). When you leave (please, please leave) they can file the restraining order you will almost certainly need. Be honest with your lawyer, once you've hired them, their only job is to protect you.
Shhhh!!! Be vewy vewy quiet. I'm hunting wabbits. I mean unicown wabbits.