Do I have any chance of being successful for a diminished value claim for my car?

She is responsible for all of your damages including but not limited to; diminished value, costs of repairs and loss of use. Open a claim with her...

Insurance company suing me, How can I resolve this?

I would consult with local counsel. The damages you could be liable for will likely exceed the legal costs.

Can I take a person to small claim court

File a law suit for your injuries against the at fault driver.

You will not be paid twice for the same injury regardless of the source of payment.

The at fault driver should pay. Turn it over to your insurance and let them sort it out.

If a lien was granted to a insurance company, can my wages be garnished too?

They may seek any garnishment or lawful means of collection available.

When someone is driving 30 mph and comes to a fast stop on a busy road and you hit them from behind who is responsible

You are at fault for failing to maintain an assured clear distance. If the later had a subsequent accident that day, their injuries and damages...

That is a question for your state's pharmacology board. Any administrative suspensions would be handled by that state's licensing board.

Was I in the wrong

Yes, you are at fault. There lack of insurance is not relevant to your fault.

I sold a car to someone and before they could get the car out of my name

Be sure the car is not still in your name. Show the bill of sale to the other side. You may need to hire a lawyer.