Looks like 2 questions.
If you get the hardware bundle and the plastic bundle all you would need is a tool/spindle and some bits. if your tool doesn’t have a speed control like the dewalt dw660 a $20 speed control is nice. You will also need a table or surface to mount it on.
As for the software side. lots of them work for free. You would either export you models as dxf/dwg for 2.5d cuts, or as an stl for 3d cuts. Then I run them through estlcam to make gcode. Then I use repetier as my control software to send the gcode to the machine.