How long can I stay?

If you are given permission to stay for 6 months, that refers to that particular entry

Am I able to divorce after filing for citizenship based on marriage and still be able to get citizenship in 3 years?

Sorry but that won't work. You have to be married until you become a citizen. Even if USCIS did not check you still have the burden to tell the...

Petition for a step father, he raised me since I was 4 years old, but he married my mom after I got 18

Unfortunately since the marriage took place AFTER you turned 18, you cannot petition for your stepfather. You can petition for your mother -...

I had an infraction in 1995 which I paid a small fine for. When I applied for adjustment of status I submitted a certified copy

In theory USCIS should have the original in their files already. But then, this is USCIS. If you want to avoid delay, you can submit another one.

Green card interviews

As many as necessary for USCIS to make a decision. In most instances that would be one interview, but I have seen up to four.

Can I travel back to my country with i485 pending on "battered spouse" based case? Can I make a quick trip to my country?

Meet with an attorney before traveling. You may trigger an unlawful presence bar, but without knowing more I cannot say.

Fiance visa related query

At least 6 months, probably more.

The fact that DMV gave you a driver's license does not mean you are in status. All it means is they gave you a driver's license.

Apply for reinstatement or wait...

Presumably you can wait for reform after a denial since the reform, if it ever comes, is intended for people who are out of status, which you most...

I lost my conditional 2 year green card and im due to file next month and i have not made copies of it what do i do? please help

Hire a lawyer. You will save yourself countless headaches and they will help you to successfully remove the conditions and get you a new card.