Buy another one. That's all I can tell you. To answer a question, I need to know what happened not just what didn't happen. I have no information with what little you have given me.
yes. people have done that
No.
depends on the insurance company
Diabetes is not contagious so you cannot catch it. It would no way related to a car accident.
Get it fixed.
Yes!
you cannot drive the car if the airbag is deployed, its pretty expensive to have them fixed
Has this car been in an accident?
That would be hit and run, which is illegal. No, you cannot.
It is good to tell your insurance company within 24 hours of the accident. This way you can receive money from your insurance company soon so you can get your car fixed.
In most cases, you can get it fixed yourself. When the insurance company totals out a car, that is all they themselves are willing to pay. If you want to pay to have it fixed yourself, most won't care, but your rates may still change depending on the circumstances of the accident.
No. If it was your own vehicle and you caused the accident then it is entirely your responsibility that the damage was caused and that you get it fixed.