According to the ad, aside from adding or opting out on a CO2 tank, the kit includes
- One Pin Lock reconditioned 5 gallon stainless steel keg
- A dual gauge regulator
- A hand held tap
- And all necessary hoses and fittings.
I'm going to go with the last line and say it has everything you need to start kegging (except for some beer and a fridge).
If that turns out not to be the case, I think you should sue Midwest