because your using your car too much!!!
that means the battery is not good
put the doors back on or get a new battery
You can get a new battery, you can jump start the car with jumper cables and another car with a charged battery. You can also put a battery charger on your battery to give it a charge.
The the alternator is defective.
Go get a new battery using another car. Or get the dead car jump started using another vehicle. There are companies that have mobile battery services that will come right to your home or wherever the car is located and replace the battery.
you would buy a new one ,charge it, or call someone who knows more
Is there power to the starter "S" terminal? What car?
If by charging system you mean battery light then check your battery. It might be dying (or dead). Chances are your car is low on power. Either check and refill the battery with electrolyte (distilled water) or buy a new one. Also, your alternator could be dying. Check that with a test light or a voltmeter.
it can help but not always the first thing to think if your car is not running properly. once the car is on and running it does produce its own electricity. hence that if you get a jump start you run it for at least 30 mins so that the battery recharges and you can start your car later
Disconnect negative cable first from old battery and connect it last when installing new battery.
New batteries almost always come fully charged. If it was not then charge it with a battery charger and do not use your vehicle alternator to charge a dead battery. You may do harm to the alternator which is not built to charge a dead battery but is instead built to keep a good battery fully charged.
I had the same problem with a Lebaron I had. It turned out to be a wiring problem. Luckily there's really no part cost to fix this problem, just labor in tracking down the bad connection.