Need alot of help picking out my router cnc machine

Looks like that CNC comes with motors and a control box. As far as computers a laptop would probably work but make sure the setting will not allow it to turn off anything while cutting through the power saving menu. If you don't have a computer I recommend getting a cheap Desktop to run your CNC. Once the system is up and running I would not connect it to the internet because any updates it might make could cause problems that might be very hard to overcome.
I do notice that they say "up to 2" material clearance", so that will need to be remembered when designing a project and setting limits for machining. In my opinion that is not enough clearance. One thing to consider is having the open area under the spoil board but also limits of Z travel need to be considered for proper placement of the project blank.

As far as design software goes I recommend Vectric software. What Vectric software you use is up to you but the CNC you are looking at does have a working area larger than the basic software but could be used to get started learning. Also upgrading to the next or higher software package involves paying the difference between the cost of the 2 packages so you don't lose and money by slowly upgrading to better packages. You can do 3D projects with VCarve Desktop or Pro with some limitations but if you want to design/create 3D models with their software you need Aspire. You can create 3D models in other programs and import them into VCarve (limited to 1 3d party model) or Aspire (unlimited number).