This is not advisable and you should depart with passport in hand.

This is often good evidence of a bona fide marriage. Consult with an attorney for guidance.

Best to contact your state bar for guidance. Good luck.

This is not possible even if case is expunged as must still be disclosed with USCIS.

Best to refer to form instructions to confirm assets are sufficient. A cosignor may be easier to establish support.

No this shouldn’t impact the parents subsequent petition.

Yes this should not be a problem for reentry.

Best to go to same civil surgeon for RFE.

Best to speak to a criminal defense attorney for guidance.

Your friend can apply for a visitor visa on his own showing substantial family and financial ties to home country.