nothing fancy like irons?  Well you will need that for basic waxing. =o)  Anyway,  you will need an edge bevel for your side edge, and if you care about your base edge and dont want to spend too much money, I think Toko and Swix both make an side/base edge beviler that will do them simotaniously.  If you are just doing park stuff you probably dont need to worry about the base bevel.
Back to the tools.
Side Edge Bevel (0-3 degree)
Base Edge Bevel (can do 0-1 degree, but you can also just use a file and put some tape at one end, ask if you want to go this route)
A Medium Grit Diamond Stone (Removes Burs from hitting rocks etc.)
A Hard Gummi Stone (for removing rust from edges and smaller burs)
A Good File (Made specifily for skis, not from the hardware store)
A Hot Wax Ski Iron (It is worth the money to buy a low end Swix or Toko Iron MADE for skis, they just work so much better than a regular iron.....)
Wax (Swix/Toko/Holmenkol Yellow+Red/Pink, Yellow for warm days, Red when it is cold)
To clean all you need to do is hot scrape your bases.  To do this throw a quick cote of wax on the ski and ebfore it gets cool scrape it off.  THis will pull any duirt or debris out of your base.  Works much better than base cleaner, and isnt bad for the ski.
All of this stuff is not cheap though.  However it is much more cost effective in the long run than paying to have it done, especially if you are doing other skis, like your own quiver, or your family's.
Drop a line for more questions.
peace