You'll have to pursue the person who hit you and if they have insurance their insurance will defend them.

You should contact your attorney and request a meeting to go over the questions you have.

I highly recommend you talking to a local attorney to see how they can help.

Do not sign anything, you need to contact an attorney as soon as possible.

Yes, they can change their mind. I suggest hiring an attorney to help you navigate this process.

It depends on lots of different factors, you'll need to talk to a local personal injury attorney.

You will be responsible for the damage to the car and the personal injuries sustained by the passengers in your vehicle and the car you rear ended.

Like most things in the law it depends. You'll need to talk to a local attorney to get a more complete answer, there's simply not enough...

Request the police report to see if you can get his insurance information. Hopefully he has insurance to help you pay for the damage to your car.

Almost impossible to know if that would be a reasonable settlement. I highly suggest you talk to a personal injury attorney in your are.