I need help on how to get out of a financially n other abusive marraige and stay safe doing so

Apply for legal aid. Also consider looking into a women's shelter.

Is it possible to have a case in my situation?

Were you injured? Have you sought medical care? Why do you think you have a case?

How difficult word it be for me to obtain a CHL in the state of Texas with 2 felonies on my record?

Very difficult unless you can gain the Governor's favor.

Retaliation and wrongful termination?

Texas employers can terminate for any reason except discrimination or breach of contract. If you still have questions you might want to contact an...

Right to bear arms

Only if you can get the Governor on your side!

Can I take a bodyshop to court?

Look into JP Court if all other attempts to settle have failed.

Might be worth your time to research this with a Probate/ Estates attorney.

Child visitation

Talk to your attorney about how to enforce the decree. No one else (law enforcement) is going to help you with this.

Who is responsible for the medical and guardianship of my daughter now?

Sounds like you are legally responsible! Unless a court ruled over this you are still the custodial parent.

Disconnection of my apartment electricity without prior notice while my minor kids 7 and 5 years old were at home with a nanny

Probably not much to do. You are still married and the utility was not willing to start service without some cooperation from both spouses. Maybe...