A:AnswerIf your PC uses a single 3.5mm connection for both audio and microphone, yes. If your PC requires a separate cable for each, then you will have to buy a y-splitter.
A:AnswerYes, it will sync. Acting like normal headset and there will be no sound coming out of your TV if its connected unless otherwise changed from settings
A:AnswerMake sure you have the wires plugged into the right output jack. I once accidentally reversed the wire and my mic did not work & plugged the wire into the mic outlet by mistake. Believe it or not it took me hours to figure out a simple mistake!