It should start with new battery but your battery will go dead fast.
Are your battery cable connections clean and tight ?
the battery job is to start the car so the alternator will kick in after the car is running
alternator?
Most definitely.
That could be the alternator or the battery. Try jump starting your car with another car's battery. If it still does not start, it is probably the alternator. If it starts, your battery is dead.
If car cranks over and won't start it is not the starter, alternator or battery. Most likely the ignition wires or module, fuel delivery system or air intake meter.
The the alternator is defective.
the batteries only serve to start the car and the alternator. I'm not sure if it would be your alternator but it's not the battery.
jump start the car and get a new battery and if it isn't the battery it could be the alternator or both, but try a new battery first
its the alternator if the car is running with a battery light on. but check fuses first
It will start if there is enough charge in the battery to turn the engine over. However if the alternator is weak then the battery will not be charged fully.