I.am done with this

I do not know what you are talking about have you been arrested then talk to a lawyer right away.

Will my SSI "backpay" be affected by getting a full time job (gainful employment) immediately upon winning my case

If you get SSI then that means your are disabled not able to work.

Is it legal for companies in PA to charge the employees they hire to pay for background and drug screens?

If they charge it and you pay then yes it is legal

Can maximum strength sudafed otc nasal spray and musanex cause a flase positive for amphetamines or methampetamin?

Generally not but you can get your own test or hire a chemist to dispute same.

Is it legal for a heating/plumbing company to take a piece of my furnace?

This is not an employment question. You can sue them in small claims court.

Will I be denied to buy a firearm?

Key would be whether you properly disclosed then you would be ok.

It depends on how long the wrong survey has been used and whether adverse possession has taken place.

Is a tv I bought and said was a gift when asked off guard. Legally my exes even though he paid for nothing.

This is not a real estate question if you bought it for him as a gift then yes it is his property.

How can I get a green card if I am an international with an American son?

That's great. I would suggest meeting with an immigration lawyer right away.

What can I do if I feel I'm harassed because of FMLA?

You can meet and discuss your case with an employment lawyer to see what your options are.