Good lighting is essential

Good lighting is essential. Look in a TV studio of any kind and the most prevalent equipment you will see is the multitude of lights.

Good audio (mic placement) is also very important – use decent mics on boom poles or wireless lav’s if you can.

A tripod is also important, as is a teleprompter and talent that knows how to both run it and read from it (both sides of the camera).

I think the camera is the least important piece of the puzzle as even a good consumer model will yield decent results.

Just MHO.