If you have that type of insurance coverage your insurance will pay. Otherwise, you can sue the driver and owner of the car.

Based on these limited facts, it may be illegal; more facts are needed.

Yes, if your bank will allow it. It is up to the bankers.

You may be able to sue for a partial rent refund, but probably not for the car damage.

It is not clear as to why he is claiming something was done wrong. Consult with experienced attorneys or list further facts in re-posting your...

You should consult with experienced nursing home/elder abuse attorneys.

There may be a lawsuit for fraud and elder abuse. Consult with an experienced attorney. https://www.avvo.com/find-a-lawyer

A small claims or other lawsuit may be required.

Suing in small claims court and having the vehicle towed may be your best bet if you cannot negotiate with her.

You should consult with an Asset Protection attorney https://www.avvo.com/find-a-lawyer