what is needed for pc ground station and a vision plus?

Well you will need the wireless data-link at both the ground and air end for a start.
Does it not all come as part of the ground station kit ?
You can read the manual for it Here

The PC Ground Station is not supported on the V+. Not that that means it won't work. But, you'd probably have to disconnect the WiFi module from the flight controller (might kill the FPV, I'm not sure) and the 2.4Ghz version Ground Station hardware might interfere with/get interference from the V+'s WiFi if you have to use 2.4Ghz in your country.

Check this: link is here