Can I sue someone who has included my name in a matter that I was never involved in?

As Attorney Gravelin posted, it would be advisable to get an attorney to defend yourself. I do not see a basis for a counter suit.

Drunk driver

You should get a settlement range from your lawyer, along with the valuation explanation. Then you can get a second opinion from another lawyer if...

Is it illegal for a PI to enter a home to gather information if they use a hidden key that was under the mat?

Yes the PI could be arrested - file charges with the police. How do you know the PI was in your house and how he gained entry?

I guess I am at fault for a car accident according to a police report I received a letter and I'm being sued what can I do ?

I agree with the response posted by Attorney D'Aunoy.

How can my old job fire me for being in a car wreck

Employment is generally "at will" which means an employee can be fired for any reason or no reason.

Insurance company lied to me to stall for time on my expensive medication. Can I sue?

I agree with the post by Attorney Neufeld.

No, you were at fault. Turn over the suit to your insurance company.

I was involved in a car accident with a school bus . I have possible herniated disc . Would returning back to work hurt my claim

You should be asking your attorney these questions.

This would be a medical malpractice question. You would need to get an expert opinion - I think this case would have a lot of hurdles.

How much I have to compensation if I caused an accident in the car?

You should report this to your insurance company.