Not sure about the 999 but expect it to be much the same as the rest of the superbike series, since the all uses similar engines.

Service intervals are every 6k miles, and unless it's a 999R, it'll be minor service at 6, 18, 30 and major service at 12, 24, 36.

Major service will include timing belts.

Costs - At a Ducati main dealer, major service will be around £1K (possibly more if it needs other stuff like clutch plates etc)

Ducati Independant, half that (same deal with the extras)