I took my car to Mercedes and they indicated to Carfax that my mileage was roughly 40,000 more than it actually was.

Sell your Car or outright sue whomever fixed the mileage. Panic attack can be alleviated by hiring a lawyer to sue.

I would like to get my rights back

Consult a lawyer in Florida and or Virginia.

Priceline.com - Do I have grounds for a lawsuit and potential victory, I believe I do.

Sure seems like it sue em!!!!!!!!!!!!!!!!!!!!!!!!!!!

How was LinkedIn able to sell my info to other companies that call me all times of the day and night

Best to ask linked in marketing program to see how.

How can i go about with a lawsuit

You will consult with a personal injury lawyer and they will evaluate you claim and see if it is worth pursuing.

If I get a background check in one state, will an arrest warrant from a different (non bordering) state show up?

You betcha>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> best to clear to clear the warrant and deal with it head on will follow you forever.

If there is no child abuse and mother is asking the judge to allow child to testify, do I have the right to cross-examine?

Yes absolute right for your Attorney to cross exam............................

If a custody case that has been ongoing for 9 yrs, is on calander now, can you dispute old evidence if you can provide proof.

Guess is yes but best to ask your lawyer.

What type of custody agreement should I request during mediation?

Without a Court order anything goes and is not enforceable. Courts hear evidence and rule in favor of the party mother and/or father.

Just have your lawyer to substituted process.