Yes: you really really should have involved an immigration attorney in this process. I highly urge you to do so now.

New NTA policy for I539 (dependent), Application to Extend / Change Non Immigration status?

Get an immigration lawyer involved.

How does a one-year-old LPR infant return to the U.S. after 3 year staying outside?

Do not risk abandoning your child's LPR status without first getting a Reentry permit. I suggest you get a reputable immigration attorney involved.

What is the process to apply for a U Non Immigrant Visa?

Yes. You and your wife would be well advised to schedule a meeting with a reputable immigration lawyer who handles U visa applications.

Can I fly domestic plane in USA with expired 1-94 ?

The travel you propose is risky. I also do not know if you have a valid driver's license given your situation, which is usually required to check...

Green Card

Ciao Massimo, that may be possible. Consult in person with a reputable immigration attorney to learn about eligibility as well as the process.

I-130?

Next your wife will need to fulfill the requirements of NVC which include sending in a visa packet, completing forms online and paying visa fees....

How can I give my husband papers?

Yes. Schedule a consultation with a reputable immigration attorney. It is hard to determine without detailed questions and information what he may...

How can I reenter the USA after being granted voluntary departure?

You do not mention in any of this that you got assistance from an immigration attorney but obviously that would be a good idea even now.

Can I?after filing I-131 in USA and receiving notice of acceptance leave USA and return for biometrics

There are ways to maintain your green card without giving up lawful permanent residence if you have a stay abroad that spans longer than 6 months....