Did the description say if it has to be an SLR camera? I'm asking because there are point and shoot cameras as well as rangefinder cameras that are automatic or manual 35mm cameras, respectively. You should read the description carefully one more time.
If the description doesn't say, then your safest bet is to purchase a 35mm film SLR camera, lens included. (and tell the school to make their description clearer next time).
The "6.6-21.6mm" is the zoom range of your lens; it has nothing to do with the 35mm camera format (I agree that this is confusing, especially for people new to photography).
The "1:3.0-5.8" also has to do with the lens, not the camera. You'll learn about this once you take your class.
No, your canon is not considered a 35mm camera. (since it is a small sensor, digital, point and shoot camera). So obviously you can't use it for your class.
Even digital SLR cameras can be considered to be "in the 35mm format" in order to distinguish them from medium format SLR cameras. I realize this is confusing. You'll understand after you take your class . . .
Sony does not make 35mm film SLR cameras. Minolta does, though. As does canon, nikon, pentax, olympus, fuji, rollei, chinon, contax, konica, praktica, yashica, vivitar, ricoh, sears, etc.