Based on the information you have provided you are an LPR and you already have a green card. Unless you applied for a new or replacement card why...

Yes. You need to explain even though it was 20 years ago. The illness of a family member is a legitimate reason.

You will need to begin the process from the beginning. The first question is whether you qualify for lawful permanent residency.

You must have employment authorization and a Social Security Card.

Yes. You can file for divorce in the USA after you meet the residency requirement in the jurisdiction where you plan to file.

My first suggestion is that your uncle consult with an experienced immigration attorney.

I suggest you look at schools and contact the school you are interested in attending regarding a visa. The immigration law regarding employment and...

If you were married more than 2 years before receiving your card than you correctly received your 10 year card.

You are no longer eligible to adjust status through your spouse if you file for divorce. You will need to file on your own through the VAWA.

No you re not entitled to a refund. Regardless of whether you are a citizen you will be eligible to receive SS Benefits and Medicare based on your...