Open your Servuo Scripts folder then look for Quests folder open this and it will show alot of quests in there \Scripts/Quests if you go threw all those quests you will pretty much see what servuo has so far
If you're interested in seeing a more detailed list of what ServUO has to offer, consider donating to our Wiki fund. ServUO is a fork of RunUO, with updates from runuo.com and RunUO 2.5 (Marks version) merged into ServUO as often as possible. Plus ServUO has other stuff to offer as well. Easiest way to see what it has to offer atm is to poke around and explore.