H1b

Your question is multifaceted. If you are entitled to a post-sixth-year extension of your H-1b, and if the extension request was properly filed, ...

College Transfer while on f1 visa

My colleagues are correct. Wait until you reinstatement request is approved and then go to the next college.

"Do I need to go for re-stamping"

I agree with my colleague both that you can re-enter on the H-1b visa from company A, and with regard to the documents you should travel with.

Sending passport from USA to Canada to correct error on current H1B stamp

I believe you should send it back but not without having your attorney review your situation and okaying it for you. I do agree with my colleagues...

How can I bring my fiancé to USA faster. I never met him in person.

Although you have never met your fiance, you may still qualify to apply for a K-1 visa for him if you can show that arranged marriages are the norm...

CIS will likely reject your payment.

Reinstatement failure

All of the scenarios you mentioned are possible. You really need to have a consultation with an experienced immigration attorney.

Can a director of a foreign company apply for L1 visa while is USA on valid b2 visa

Yes.

Although CIS may forward it to the correct address, they will probably reject and return it to you.

Transferring court documents

You will need to file a Notice of Motion for a change of Venue, which the Court may or may not grant depending upon all of the relevant factors...