immigration is your character moving to another game card.
There are a lot of online Immigration sites that you can apply for green card.
yes
u need a green card
go to immigration department and get a new copy issues to you. they already have u data by now.
Per Immigration law, YES you have to renew the green card to be a legal resident.
Yes,
They would want to go to uicis.gov which has all the information about immigration services. They have the forms for applying for a green card or for applying for citizenship. They have information about all the laws concerning immigration.
If you both have your green card, then no immigration steps need to be taken.
If I have understood clearly, then you mean to say that you have returned your green card back to the immigration. Can you be more clear about why you had to give back your card? If your green card was revoked by the USCIS, then your are chances of applying to get a new one is very thin. You have to give in your green card when you have taken the Oath of allegiance during the naturalization process. In that case, you will not require the Green card as you would have become a US citizen by that time.
Contact the Customs and Immigration department.
it can and it can not in many cases it would depend on the immigration officer you can take it to an immigration court and prove your case since you are not convicted of a crime but the immigration can always ask for police doc's