My brother volunteer his deportation can he enter back in the us under dream act

There is no dream act., If you are referring to DACA, the answer is no.

Can I enter, leave and re-enter the country after 6 months stay with my Tourist visa?

The more frequent your trips to the US and the longer your visits, the more likely it is that you will be denied admission.

If My parents have USA permanent residency card, can they filed immigration petition for me. I am married person of 31 year age.

No. Only US citizens can petition married children.

Where is my EAD

We are neither USCIS nor USPS. We therefore do not know.

Can I get married to a US citizen in the US while I am there on a J-1 visa. And can I after that apply for a change of status?

Married? Yes, marriage does not depend on immigration status. File for adjustment of status? only if you either are not subject to the two year...

After the i-130 for a spouse get approved. what it is the next steps, what kind o docs they need. how long take to get here visa

You wait for NVC to send you instructions.

None is apparent from your posting.

Green card through employment. Marry before filing or after?

If your spouse maintains status, your spouse will be able to file for adjustment of status when you file. The Court of Appeals for the Third...

Can I apply for an Immigrant Visa as a Spouse or Fiancé of a U.S. Citizen while I am on a J-1 trainee visa?

You can be petitioned. Whether you can file for adjustment of status depends on whether the J-1 is subject to the two year foreign residency...

If you received the travel document, it remains valid until USCIS notifies you otherwise.