Hi I am a usa citizen married to a indian national have 2 kids my husband torturing me mentally every other day

No unfortunately this is not possible.

The printed I94 should suffice for naturalization purposes.

You may file the AR11 based on pending application.

Do I have to pay the I-765 fee?

You do not need to pay the I765 fee if filing with underlying I485.

Can I be a joint-sponsor with my wife in the I-864 form ?

Yes you may act as sponsor as intending immigrant.

Can I sue the accomplices to my husband’s marriage fraud?

You can discuss the issue privately with the appropriate attorney to determine if worthwhile to do so. Good luck.

Yes you may travel on the existing B1/B2 visa despite who sponsored the visa.

I-751/ e-verify

You will likely need the physical receipt for e-verify.

You may refile the entire application but best to work with an attorney given denial.

HHow can i go about getti g married to a Mexico native with me being a united states citizen ?

You may marry in Mexico and apply for consular processing through filing of Form i130. Consult with an attorney for guidance.