You can file with the NYC Commission on Human Rights against both the company and the manager. You do not need a lawyer. Even if you do not see a...

My supervisor went to the main office to get me terminated with the on site manager knowing about it.

It sounds like you are being accused of insubordination by your supervisor. The union will schedule a meeting with the manager to fight for your job.

My lawyer failed to include my employer and only included the civil service commission in appealing their decision in the art 78

You can't amend or start a new Article 78. But you may be able to file an appeal. There is a very short deadline to file an appeal.

Is my company breaking employee privacy ?

No, but could very well be libel if not true. It would depend on how much detail is posted.

What can I do if my manager is gossiping about firing me?

There is no law that regulates this situation. But if you are fired before the date you gave, you can apply for unemployment insurance.

If I'd contact an american airline to sponsor me, for a bilingual vacancy they have open for a while, would there be any way?

If you need to apply for a work permit, you probably need to contact an immigration attorney.

A person's medical history is confidential and I believe it will not be revealed in a background search. He should consult a social security...

Can I sue my former boss for defamation of character ?

No. Not sure this would be better than what he is saying, but a strongly worded letter from a lawyer will probably stop him from saying anything...

New York City has the strongest laws to prevent disability discrimination. I recommend you file with the City Commission.

Employee issue?

I recommend you consult with an employment lawyer before making a decision. In order to give you a legal opinion, an attorney would need to spend...