Will I be able to move to F1 Visa from h1b visa when I have an approved I 140?

Very unlikley, unless you can satisfy USCIS of your non immigrant intent.

What if your parents had filed for you when you was ten and got denied?

What had been filed for you remains in the record, without knowing what happened at that time, makes it not possible to assess the possible impact....

Husband is in the process of filing for a green card, what will he need for prior arrest?

The police report should not be required. If USCIS wants a copy they will let you know.

My husband petitioned Me and our kids just recently arrived here in US and found out he have another woman here. What can I do?

Are you asking an immigration question? If yes you may want to repose the question with additional information or contact an immigration attorney...

How many extensions can I get on H1b?

First three questions Yes, Yes, and Yes. Fourth question - OMB does not make regulations for DHS.

The hold is good until ICE takes him into custody or the hold is released.

I 730 Estimated processing time

Check the USCIS website for processing times for the location where filed. USCIS.GOV

Can I resubmit an I-130?

Yes you may refile and restart the process from the beginning. You can also try a motion to reopen and reconsider.

I-751 Biometrics walk-in ?

Yes - often if a center is not particularly busy that day they will accept walk ins, assuming you have an appointment letter for an already...

Can I enter US after a trip outside US?

It is always possible to be refused admission, however, being a resident from Syria is no different than being a resident from any other country....