1. I was wondering does the Big Commerce Theme - sb-revo.mybigcommerce.com have the ability to create banner ads?

if so:

A) The ability to add more than one banner per page?
The ability to schedule the banner as well, show 04/001/20 - 10/31/20?
C) Can the banner be any size or should we use the web standard banner ads?

We are trying to mirror what our competition is creating: www.midwestgoods.com/

This our current site uswholesalevapor.com

2) Finally how much custom can we do to the theme?

Please you go here www.smartaddons.com/support/tickets submit a ticket.