You may have a lawsuit against the company and be entitled to a recovery. Consult with experienced attorneys in the state where this occurred.

You cannot do that legally. They can decide to repo or not-check the contract. They still have any other legal remedies.

Taking back the car, even in your name, is risky. You may need to sue. Consult with experienced attorneys in the state where this occurred.

Consult with experienced debt collection attorneys in the state where this occurred.

You can. Anyone can make a Bar complaint for ethical violations by attorneys. In what you describe it is unlikely they would take any action as...

It may be a good idea. Many cities or counties have legal aid or other organizations that provide pro bono (free) legal advice and services.

You may have complete defenses to any lawsuit. Consult with experienced attorneys in the state where this occurred.

It is both a crime and civil case. When there is a bounced check there may be specific requirements before you sue, such as a demand letter. Read...

All indications are this is a scam. Whenever one is unsure, give no information, demand proof in writing (do not give your address or other...

They likely cannot collect against you except to the extent you inherited money from your mother. Consult with experienced debt collection...