EAD Renewal based on I-797C and not on extended I-94 for L2 visa holder?

The attorney should have filed an I-539 application for you to extend your dependent status.

How is the process to adjust my future wife under J-2? I received J-1 when I was a single

She would have to apply for the J-2 visa after marriage at the US Consulate.

Can I teach online on CPT part-time (no more than 20 hours per week) under my F1 visa status? What is the process? (tax etc.)

Consult with the DSO at your school to find out if this would be permitted.

Is there any lawyer in DC/ Arlington/Fairfax area that would help me? and also offers consultation maybe on phone and weekends?

Click on the "Find a Lawyer" button at the top of the AVVO web page and start there.

How long do they usually take to reschedule an interview?

You should receive a notice within 30-60 days.

The H-4's status depends upon the H-1B maintaining status.

Will divorce affect CAP exempt or CAP subject H1 in anyway?

Your marital status has nothing to do with your employer's cap-exempt status.

Is that OK if i send another email to asylum office or setup info pass appointment?

You can follow up with the asylum office director via mail or email.

I know i have to file a form and then have to send waivers but about how long does this process take?

You need to consult with an attorney to identify the specific ground of inadmissibility that apply to your husband.

I am an international student in the USA with the F1 Visa. I want to sell the goods from my country to American people.

You would have to obtain a work authorization document from the USCIS to do this business legally, or run the business from outside the US.