Is Greencard Renewal Sticker enough to travel outside US or I-551 stamp required on passport?

The sticker is the only thing you are able to obtain nowadays. It is good for travel.

I agree with both answers above. You need to remain patient for a little longer.

if everything other attempt failed or bore no fruit, then appear at the employer's office in person.

My case is suspended and I am on 2 year probation. I am here on student visa. I want to get it expunged or pardoned.

Not possible to pronounce myself one way or the other without first having analyzed the criminal record. Show to a local attorney.

How soon after an AOS interview can I contact USCIS?

Immediately begin your inquiries on the 800 number and do not stop until you are raised to Level 2.

I agree. Simply list there the same name as found in the passport, even if that only the first name.

I485 RFE. Missing birth certificate

A legible copy of the original BC will be acceptable to USCIS.

My Nj license going to expire this week. Do I have any grace period.

You really need to take this up at your local DMV.

What can I do?

Seek to have an experienced attorney review that N-600.

How Can I re apply for uk visa which I was refused for the past 4 years?

That's a good question to pose to a lawyer in the UK.