A:AnswerYes, if your turntable has a built-in pre-amp and a 3.5 mm stereo connector. Just plug-in system's AUX IN jack. Probably not, if turntable has an USB connector.
A:AnswerPlug-in your BT transmitter in the system's PHONES jack - 3.5 mm stereo connector - and pair the transmitter with your wireless headset, per both devices instructions.