First, make sure that you really do have a Green Card. Second, if you do and are over 18, obtain a replacement card from USCIS. Assuming that you...

Your mom should apply for a B1/B2 visa. You should focus on graduating HS. I am sure that your senior year, in the midst of a pandemic, is...

As long as it is a valid, unexpired photo id. You should also bring the I-797C.

To qualify for the three year rule, you must be married and living with a US Citizen spouse for three years. The time period, prior to your wife...

If you are a legal adult, you may apply for a replacement Green Card. I do not believe that the fee would be waived.

I would start by calling USCIS. 1 (800) 375-5283

Certainly your credibility may be at issue. I do not see why it would be impossible though.

You may sponsor your parents. You will need a joint sponsor for the affidavit of support.

Unauthorized employment is not a bar to adjustment of status for spouses of US Citizens.

Yes, with a US Citizen sponsoring spouse.