Best to consult with a tax professional for guidance.

If no longer eligible under the 3 year rule, best to withdraw and reapply later under 5 year rule.

Yes you may but within the previous requested period of authorized stay.

No as the case is now with NVC there is no requirement to notify USCIS.

It means that no action was taken within the 1 year requirement.

Consult with your retained counsel to determine next steps.

Yes USCIS may deny the application if both parties do not appear at interview.

Yes it could as it is a showing of your immigrant intent.

You may use the Avvo search to find a reputable attorney.

More information is needed about the removal to better answer.