Assuming you mean the PCV (positive crankcase ventilation) valve, yes.
The headlight is not a part of the emissions system.
Yes.
YesYes
No. Normally is is considered part of the fuel system.
Yes, it is an intercal part of the emissions system.
No. The muffler is a passive component in the exhaust emissions system.
yes
Catalytic converter
yes
Yes
Yes it is part of the emissions system. It turns exhaust into lower emissions by burning any unburnt exhaust gases thus reducing unwanted emissions and Carbon Monoxide.
Pvc is not part of a vehicle, but the pcv is a one way valve for venting the crankcase ( Positive Crankcase Ventilation ) This is on a vacuum hose connected to the valve cover and leads to the intake.This is part of your emissions control system and should still be covered by the factory warranty.