This is good, but wide question. The best full size radio controllers are Radiomaster TX16s, Jumper T18 or Eachine TX16S. The smaller one I personally like is Jumper T12 (Pro). Also there is good gamepad compact size controller Jumper T-Lite. These are multiprotocol radios, means they can control almost any radio receiver.
Video receiver depend on the quad you want to build – from the nano sized VTX to the full 30x30mm sized VTX with heatsinks.
Also I would suggest to join the Beginner to FPV group on FB. (https://www.facebook.com/groups/737714537075441)