Can i change of Employer and the job when i received a RFE on my H-1B extension Petition, that i need to answer

It is your employer, NOT you, who needs to respond to the RFE. Changing employers is not going to resolve the issue.

Hello, am a masters graduate who graduated in the year 2011. Now, am planning to enroll back to school on F-1 again

To work, you must have USCIS authorization.

My fiancé is from Russia and has been here in the states for 10 years on a visa. his visa is about to expire, can it be extended

The son would need to be at least 21 years old to petition him.

Can I buy and own a real estate?

Yes, and yes.

Do I still have a chance to get a citizenship?

After having the green card for four years and nine months. minimum.

Because you have apparently not met your burden of establishing that you will return home and not remain in the US.

Can I stay in USA and continue working legally while I'm going to appeal my H1 and while in the process of appeal?

You can continue working through August 19th. Your authorized period of stay ends 60 days later. An appeal does not confer status, nor the right to...

What kind of document do i need? Estate or immigration lawyers or anybody?

Deportation does not result in property being taken by the government.

Can I apply for EAD under TPS while I have a vaild one under pending AOS for a long time?

Yes You should retain an experienced immigration lawyer to review all the facts, advise you, and handle the case. You can find one through...

Do I need to send all the application forms for temporary residence to the same address of the USCIS?

If filed together, yes. You should retain an experienced immigration lawyer to review all the facts, advise you, and handle the case. You can...