This would depend primarily on the number and types of positions that were laid-off. Consult with an immigration attorney.

Will I be able to sponsor my mother for Green Card?

No, you must execute an affidavit of support and use a joint sponsor to the extent that your income is insufficient.

Hello! please if I wanna upgrade my husband I-130 at NVC did I need to fill a form I-485 or only send naturalization certificat

You would send a copy of your naturalization certificate and a letter. The I-485 is only used if he were in the US already and seeking adjustment...

Filing the I-693 ( Medical exam)

Unfortunately, you must use an approved civil surgeon for the I-693.

Where do I get the 212c waiver application? We were told by the immigration judge to fill it out but I cannot seem to locate

The application form is I-191. This can be obtained off of the USCIS/EOIR website or from the Court itself.

L1B to l1A conversion/petition pending

If you would be granted L-1A status, you could remain in the US for up to 7 years total.

Yes, you could sign on behalf of your minor children if they are incapable of signing their own names.

I need to travel to india before knowing the h4 extension result

If you depart, you will abandon the request for extension of H-4 status. Then you will have to appear at the US consulate for "stamping" with...

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U-Visa Question

Possibly, but if you do not, then you must follow-up again with the USCIS.

I want to travel back to the state

You would need to apply for a new visa and disclose any and all arrests. Consult with an immigration attorney.