I am a US citizen . Can I bring my parents to US. Their visa is expired

If you are a US citizen, you can file form I-130 for each of them ... after about a year ... they can immigrate to the US.

Can I work for a Canadian company with a j2 visa while I wait for EAD to arrive?

Sorry, you can not perform work/services while in the US w/o a work permit ... not even remotely.

This is fine under US law .... but, you may have to pay employment/income tax in India.

First ... you should talk to the company's lawyer Second ... In my experience interfiling rarely works.

You probably don't have an A number. This is normal for people that didn't have an F-1 student EAD.

What is the last date for receipt of the H1B extension without counselor processing? Is it H1B end date or I94 end date?

The extra 10 days on the I-94 are to allow people to pack and go home. Although the employer can file an extension during that period ... you...

Can I get out of this trouble ?

I would like to help you, if I knew why your greencard was taken away?

Are they supposed to contact me.

Are you the petitioner, or beneficiary?

I-485 is approved and GC issued. Will SSN card(requested through application) still come through the pending I-765 application?

Although the SS card should have arrived ... I understand that they're very backed up.

Is it possible to get the B1/B2 visa renewed from US?

No, visa stamps can not be renewed/extended inside of the US. It is NOT a good idea to goo to Canada, nor Mexico, for re-stamping.