My battery is dead and the key won't open door. How can I open the hood to charge the battery?
Use the metal key that is in your key fob to unlock the driver's door. That would be the easiest method.
If that doesn't work, try unlocking the trunk with the key. Then you can fold the rear seat and get inside the car.
The last resort would be to jack up the car and feed 12 volt at the starter to back feed the battery.
Let us know what route you go.