Two boundary microphones, preferably cardioid pattern, to be put on the floor.
One small omni microphone to be put under the TV set. Could be a wireless headset (with just the soft cable), a lavalier, etc. The important thing is that it's small enough to be hidden under the TV.
A handheld wireless vocal microphone.
Sound comes from PC 3.5 jack output.
Two monitor speakers
A generic vocal effect for reverb/delay, in the mixing board or separate.
Video for the TV:
TV min 42inch
Video comes from the computer via VGA . computer should be close to a mixing board.