Need Help! Just bought a used Virus KB

[Virus77]

OK...so I have been into electronic music for years and decided to start making my own...so I recently bought a used access virus KB, and it's in beautiful mint condition, but I have NO IDEA what to do with it! I am totally lost. I have read the manual, but it doesn't answer any of my questions. How do I connect it to my computer, since it's such an old synth? What cables do I need? Do I need to get a sampler or a mixer or can I just use my computer for that? And would any 1/4 jack headphones work with it?
Any help would be much appreciated,
signed,
the biggest newb ever