Will there be any trouble due to the previous rejection ?

Generally, your green card application should be okay since it is based on marriage.

I-797 notification for I 751?

It sounds like your 10 year green card has been approved.

Can l change my status?

I agree with my colleague. It would be best to meet with an attorney to review your case.

Will I be considered out of status, if my payroll is not run for two months?

I agree with my colleagues. You have a 60 day grace period to find a new employer.

I agree with my colleagues. You would need to apply for a change of status to a F1 visa. It is important to wait 60 days before you file for the...

Generally you don't need a sponsor for a B2 visa. Your information should be fine.

What is my current immigration status?

I agree with my colleague. You are still an J1 visa holder until the visa expires.

Biometrics fee, or not?

I believe that you will have to pay the fee again. It is important that USCIS have your current address.

Do I need a waiver to apply for a green card if I overstayed and worked illegally?

No you do not need a waiver. It would be best to have an attorney assist you.

I just got married to an us citizen. I overstated my visitor visa can I still apply for a green card thru marriage?

I agree with my colleagues. You are eligible to apply for a green card. It would be good to have an attorney assist you with this complicated process.