What can I do to protect myself from a neighbor who keeps calling the police for no reason?

It depends on what the lease says. Some leases have a provision like that and some do not.

Would you suggest getting a lawyer and what should I expect?

Everyone who has been charged with a crime should have a lawyer.

Can a decision be made on a DV case without the defendant present in court?

If he has a continuance already granted, they r not going to dismiss the case if he does not show. He has already been excused.

Ex Parte Drop

Not sure of the question. If u want an ex parte order dropped, file a motion to ask for that.

Maybe, if u went to court and asked them too.

I am gonna work as Independent Contractor for a US company, they say they will sponsor H1B in upcoming financial year, possible?

My understanding is that's how Mrs trump got here. I believe an employer who is hiring u immediately has to sponsor u to get in the us.

If the facts r as u say, then a motion to suppress should be filed by defense counsel.

Is der a family lawyer I could ask a few things ?

You can ask a few general simple things here.

My spouce arrested for domestic violence for no reason, what can I do to help?

Go talk to the victim witness coordinator at the state's attorneys office.

Do I need to speak to a criminal defense or civil rights lawyer regarding sexual misconduct in a domestic violence case?

Make a police report and report it personally to his superior.