For $200, this is a great starter camera if the camera is in good working order. Stick with the 28-105mm lens for now and wait until you've developed a thorough understanding of focal lengths and what a lens has to offer before investing in additional glass.
To be fair, Canon did offer an EF 28-105mm zoom lens with their Rebel 35mm cameras and some of their earliest DSLRs (including the Digital Rebels) between 2000 and 2003. The very site Kermit cites lists that very lens (http://www.the-digital-picture.com/Reviews/Canon-EF-28-105mm-f-4.0-5.6-USM-Lens-Review.aspx) in the discontinued lens section of Canon Zoom lenses.
At anyrate, Canon's website would be the first place to look. If I remember correctly, model DS6041 is in fact the model number for the very first Digital Rebel. If that's the case, you'll want the following links;
- http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_digital_rebel
- http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_digital_rebel#BrochuresAndManuals
- The following link to the owner's manual for the Digital Rebel (EOS 300D) is taken directly from Canon's website: http://gdlp01.c-wss.com/gds/4/0900000274/01/EOSDR300DIM-EN.PDF