Should i plea guilty or not guilty at an arraignment?

You have no benefit to pleading guilty at arraignment.

Securities Violation and N-400

From what you have described, he was not arrested, cited or detained..........................

Do Us government will send to get me from italy

Not sure what you want to know. If you get extradited to the USA, you will need a criminal attorney to assist.

How do go to arraignment on a secret indictment

As long as they arrest and arraign you before the statute of limitations expires, they are timely.

How long can a NYC hold an inmate on a warrant issued from Massachusetts while he was serving his time ?

Unless he waives extradition, they will likely hold him for 30 days to see what Massachusettes will do.

Can a lawyer negotiate a new plea deal with concurrent time if the person is already in jail?

No, but he can get the city time to merge with the State sentence.

I was forced to go to a criminal trial without a lawyer and I never signed a waiver of counsel what should I do I am out of jail

The Constitution provides the right to counsel in a criminal matter. If you went to trial on a misdemeanor or felony trial, the Court was obliged...

Can an adult have phone sex with a minor? If it's only voice?

There are laws that prohibit the corrupting of the morals of a minor.

It sounds like you were screwed. Have you spoken with your union delegate?

DACA and charges

You should answer yes...........................................................