The manual is always good as a reference.  I'd suggest a trip to the Iron Pony.  Get the filter, and the viscosity oil that the manual suggests.  Semi-synthetic should be fine.  Chain lube is good to have on hand.  Air filter might be an idea, but not necessary, as with spark plugs.   I live by Byrne's Pub in Grandview, and usually just put the bike up in my back yard.