On my green card through marriage interview and I failed to bring original birth and marriage certificate, am I in trouble?

Nothing serious but you are likely to get a Request for Evidence to submit those documents and this will delay your final approval.

Which form required to an affidavit of Support forms ? what supporting financial evidence to collect with the Affidavit

The Affidavit of Support form number is I-864 but there are several documents which need to accompany this as well as other Department of State and...

I concur with my colleague Stephen Berman.

Can I get my fiance a green card if she will be studying in Germany?

It might make more sense for you to go there and get married and then apply for her for permanent residency with consular processing.

Concurrently filing for spouse - how long after RFE is the interview and EAD and Travel document?

Work and travel card normally come 60-90 days after filing but if your RFE was for Initial Evidence the 60-90 day clock didn't start until the...

Unless you are married to and living with a U.S. citizen for the last three years, the usual rule to apply for citizenship is 5 years. You are...

With a valid EAD this is acceptable. Make sure you check with a tax preparer about whether taxes are also required to be paid in the U.S.

as long as you have kept the I-130 active you can begin the immigrant visa processing? Do you have a removal order?

Can a Naturalized Citizen petition for a foreign fiance?

Yes, you are eligible to file for your fiancee.

My driver's license will expire soon and i'm waiting to recieve my renewal of EAD. Can i renew my license?

Legally yes but you may need to educate your DMV.