Welcome.
Ducati's official web site contains product information, technical articles, parts lists, and manuals.
http://www.ducati.com/ You need to get the Ducati Owner's Manual for your bike. The Owner's Manuals for the 2000 to 2003 model year bikes are available for download. The Owner's Manual for the new superbikes are essentially the same as the one for your bike.
http://www.ducati.com/bikes/manuals.jhtml Buy a Haynes Service & Repair Manual for your bike, even if you don't plan on making repairs yourself. I guarantee that you'll refer to it regularly and it'll save its price many times over. Ducati dealers also sell a shop manual containing similar information at a premium price.
http://www.haynes.co.uk/inc/keywords.asp?keyword=Ducati Take your time and learn your bike. Then you'll have some very specific questions and a search on this message board will be informative. Diving into a complex, expensive motorcycle with a screwdriver, a spanner, a snippet of impressive-sounding advice off the internet or from your neighborhood garage mechanic, and no manual, is a very risky business.
As a start, do a search of the new and old message board on "rockers", "regulator", "filter", "tyre", "oil", "timing belt", "fuel", "octane", "flywheel", "clutch", "chain" etc.
Oh ... and join in the Ducati Sporting Club activities.