Your Tornado Wide Area vacuum cleaner is actually manufacturered by Powr-Flite. The two companies are sister companies, and owned by the same parent company Tacony.
It sounds like to me that your belt may have broken, or fallen off of the motor shaft. This may explain why the roller brush is not spinning. There is also a reset switch on the machine, on the top (item # 41 in diagram below), you should check the reset switch first. Try pushing down on this switch to see if this will restart your brushes.
If it doesn't, here are instructions on how to open up the belt, and inspect it or replace it if it's broken:
If you need to purchase a new belt, you may contact Powr-Flite at 1-800-880-2913, and request them to send you part number 19802.
Here's links to the instruction manual, and parts diagram for your Tornado, which is the same exact machine as the Powr-Flite model PF2030:
Owners Manual & Parts Diagram
If you have any follow up questions, please don't hesitate to ask using the add a comment form here on the Fixya repair page. If you have any problems ordering from them directly, feel free to contact us, and we'd also be able to provide any parts for you.
Here's how you may contact us: