Mother and step-father Australian, I wish to sponsor them so they can live in the USA.

Because of some issues with what you plan on doing, it is best to consult an immigration attorney privately to discuss this matter.

How long it takes to approve the application I-130. If i am in usa on a B1/B2 Visa, can i adjust my status permanent Residence

Probably not. Check the visa bulletin website to see when you are current.

What does this email from USCIS mean ?

It means that they will review your application faster.

I am eligible to apply to EB1 because I received an Academy Award. But I am currently out of status. What are my options?

Best to leave as soon as possible to not accrue unlawful status and apply outside the country. Directly consult an attorney.

No that is not likely. Make sure to get your passport as soon as possible.

Will U.S Government take away my U.S Citizenship if I become Belgian Citizen

You should be fine. The US allows it.

My advanced parole is still in initial review can I leave the us and come backwash my German passport instead with my ap

It depends on what immigration status you are in while requesting the advanced parol.

Is there a possibility that students of the EU will no longer require an F1 visa, but just F1 status, just like the Canadians?

I wouldn't hold me breathe. Not likely for now

Is there any proper way to move to US even when I-130 (to immigrate spouse) is in progress?

It is important that she get a reentry permit so she doesn't lose her green card.

Green card sponsor recently lost a job, do savings count?

It depends on how much savings and property they have.