I've just recently purchased TurboCAD myself and I bought the following tutorials:
TurboCAD 2D and 3D training guides, these are good tutorials especially for begginers to CAD. I found the examples simple for experienced CAD drafter, but I learned alot about how the program works. They're definitely worth buying.
TurboCAD For AutoCAD Users, worked great to change my manner of working and to get a quick grip on TurboCAD's command structure.
Architectural Ttutorial Bundle by Don Cheke, I haven't gotten to work with it yet, but I've looked through it and I'm very impressed and can't wait to get started.
I can recommend these for tutorials. There are several on the website that would probably work well also.