Somebody with more experience may chime in but you need to contact them to see the details of what is actually included. Can't see any mention of motors or controller in the description. There isn't really any stock motor controller. Most people seem to sell/use the Geckodrive or Xylotex controllers but there are others out there (some good, some not so good). Maybe check out other Taig dealers such as Soigeneris. Apart from the different models, the Taig machine doesn't change from dealer to dealer as they usually ship it directly from Taig to you. The only difference will be the stuff you add to it (motors, controller, PC ect...).
As for coolant you can spray/mist or flood but now you might need to consider an enclosure. There are systems you can buy or make (I use a pond pump for flood). I am not in USA so can't really help with tooling but instead of a face mill you might consider the Taig fly cutter.