Can I do something against her for taking my son and moving him to an unknown place without giving me his whereabouts?

She has to let you know the whereabouts of where the child lives otherwise she is in contempt of court.

Can I take my kids and leave to seek safety and shelter in another state?

If not married to the father and no time sharing orders in place then yes you can move.

Can I request a IWO

Yes.............................................................................................................

If I buy a house with both our names on the title, and he dies, does his family (parents, siblings) have any rights to my house?

The house will revert to the survivor. .....................................

Am I able to petition court to get full custody based on abandonment?

If he has not parented them for over 2 years then your chances are good. You should hire a lawyer to represent you in the case.

Where do I get the petition form? Is there a particular petition for family court for this kind of issue

File a motion and get a court order. You should hire a lawyer to represent you in the case.

My ex husband is getting remarried to a woman with 2 daughters this summer. Will he be able to get child support lowered?

He will lose, after-born children will not lower his support.

Up to 6 months. You should hire a lawyer to represent you in the case.

How much can alimony be reduced when you loose your job and get a new one paying less

You should qualify for a reduction. You should hire a lawyer to represent you in the case.

Is there anything I can do to stop him from bothering me?

Get another injunction, contact the police. You should hire a lawyer to represent you in the case.