The owner of our rv park left me as onsite maintenance man before he left for canada now onsite manager is taking us to court

You could also file a claim with the Az. INdustrial Commission for non-payment of wages. Hopefully, the judge will consider your position too.

So my past place of employment didn't pay me for my last day of work.

You should file a claim with the Az. INdustrial Commission for non-payment of wages. Good luck.

How long have you worked there? You may have rights under the FMLA. You may also have protection under the ADA. You need to consult with a local...

Do I have a Case?

You may have protection under the Americans with Disabilities Act. You should contact the US EEOC and/or a local employment attorney. Good luck.

Is it legal for my employer/cardealer to take my vehicle before I even made the first payment (I put a $600 down payment)?

You need to consult a local attorney.

Do I have any rights

You need to consult a local workers comp attorney.

Is it possible to use the social security number which was received as a green card holder when now work working on J1 visa?

It seems the answer is yes, but I suggest you contact a local immigration attorney.

Workplace harassment - manager has been trying to get me fired since she became Senior Mgr. Do I have a case?

Most states are employment at will. You can be fired at any time for no reason, but not an illegal reason. What you have stated does not appear to...

Do I have to give my medical health info to my job?

You need to contact a local employment attorney. There may be violations of the ADA and Hipaa. Good luck.

I know they violated the law/s. I just don't which one or how many. Who do I report this to and what did they violate?

Perhaps you could contact a local employment attorney or file a complaint with your state's attorney general claiming consumer fraud.