Help please!!

Respond to the RFE as soon as possible.

Applying for green card and having potential issues with sponsorship. Could an attorney help?

No. Not through a work permit through DACA, only through employment under a non-immigrant visa (E, L, H etc.).

Adjustment of status as an illegal for 4 months

If you are still a minor, yes, you can be petitioned by your stepfather and you can apply for adjustment of status.

Please are DS-160's reviewed during an adjustment of status to permanent residency?

Sometimes they do, and if they find fraud, they’ll allege fraud. But sometimes also, they don’t review them.

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Annulment and green card

Either you should be good then to file or may have to get remarried again.

I applied for premium processing H1-B visa this year 2015 & haven't gotten a receipt as yet. How long to wait before giving up?

You may still get the receipt notice. If you did not make the quota, they’ll notify you.

Can an illegal become legal w/o going back and what is the process?

I-130 / Provisional Waiver / Consular Processing,, 245i adjustment, and Cancellation of Removal are some options if you qualify.

Will marriage dissolution will have any effect after permanent green card?

At citizenship interview they may ask about it. But if the marriage was bona fide anyway, shouldn’t be an issue.

Affidavit of support for K-1 visa?

Actually, you can have them(parents) as co-sponsor.

I'm a Us citizen. My husband has only temporary green card. We got divorce. Do I have to write a letter to Immigration office?

Up to you. It’s not required, but it’s an option from your end.