Which state rules apply for child support for my matter ?

Is there an Order, if yes the Order rules. If not File in NY.

An order specified the Notice of Entry be filed within 20 days; if it was not sent until several months, is it still enforceable

Yes. All a NOE does is to start the clock for appeal.

What can i do?

You need to discuss all of this with your attorney.

Would the two cases be combined or keep seperate?

It would be if you motioned the court, and it was granted. I strongly suggest that you speak with your attorney or speak to an attorney. It is the...

If you are a kid, then no, if an adult she would need a court order.

What steps could I take to prepare myself for being taken to child support?

The best step you can take is to speak to an attorney to discuss what your options are.

Can a child support order be put back in once it was legally stopped?

As long as the child has not been emancipated or there is some sort of agreement which may prohibit this, then they can.

Custody issue

As counsel said, if its not in the order, you need to ask for a court order to grant you the relief that you are seeking, and the way to do that is...

Restraining order against someone not in US

You can try, but you would have to show that the actions were local, and then you'd have to properly serve your ex.

Alimony and Spousal Support?

I strongly suggest that you retain an attorney and have a consult to see what you can achieve. As the other attorneys have stated, your claim to...