Will a vehicle start off charger regardless of dead batterie?

No, a vehicle will not start off a charger regardless of a dead battery. A charger supplies a slow trickle of electricity to *recharge* a battery, not to directly power a vehicle's starting system. The voltage and amperage output of a typical battery charger are insufficient to crank the engine. You need a jump start (from another vehicle's battery or a jump starter pack) to provide the high amperage burst needed to turn the engine over.