If her mouth is agape, it could be something more serious than even a wound, so you should probably plan a vet visit so it can be checked out. It'd be a pity if she had a broken jaw or something. If you can take some pics, people might be able to tell you a bit more, but a vet is usually the best thing.

The bite on the back could have debris stuck to the wound, rather than have muscle fibers sticking out. Again, easier to tell with a pic. You could soak it with a warm wet cloth, so not to stress her by soaking her completely. Just wet a washcloth with warm water and lay it over her, see if she'll sit still long enough to be able to clean it off.

Neosporin WITHOUT PAIN RELIEF can be applied to minor wounds. The mouth gape could be the injury, a more serious injury like a broken jaw, just a misaligned jaw, or RI. Once you know for certain, you can have treatment lined up. Keeping where it's quieter is a good idea.

When you do get to the point of feeding her, I'd reccomend starting with smaller prey, like rat pups or slightly larger, so she won't feel threatened by it. You can always up the prey size if she doesn't have issues with it. I'm glad to hear she's out of the bad situation, and hopeful that you'll get good news at the vet so you'll soon have a happy healthy pet.