Sounds like alternator is out.
The proper way to use jumper cables to boost a low/dead battery: (1) one end of positive jumper cable to "dead" battery; (2) opposite end of positive jumper cable to "good" battery; (3) one end of negative jumper cable to "good" battery; (4) opposite end of negative jumper cable to GROUND on "dead" vehicle. Remove jumper cables in reverse order.
It would be essentially the same as connecting a battery in the car, except with longer cables. You would have to use jumper cables to extend the car battery cables. Be sure to follow ALL safety procedures. Do NOT let anyone or anything metal touch anything else except where you make the connections. Do not touch the metal connectors themselves. I assume there is no battery in the car. I will call the battery that is not in the car the "external battery". First connect the positive ("+", usually red) jumper cable to the positive car battery cable, & then the other end of that jumper cable to the positive external battery terminal. Then do the same with the negative ("-", usually black) car battery cable & jumper cable. The last thing you connect should be the far end of the negative jumper cable to the negative terminal of the external battery. When you are ready to disconnect the external battery from these cables, do so in reverse order, starting with disconnecting the negative ("-", usually black) jumper cable from the negative external battery terminal.
To hook up jumper cables, attach one cable from the negative post on one battery to the negative post on the other battery. (These usually are marked "-" and have a blacl cable attached to them.) Attach the other jumper cable from the positive post on one battery to the positive post on the other battery. (These usually are marked "+" and have a red cable attached to them.)
If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.
Bad connection between the cable end and the battery post or a dead cell in the battery. When you jump a battery, the jumper cable is attached to the battery cable, not the battery itself. Clean the post, either top or side and the ends of the cables and try charging again. If it will not take a charge, it is a bad battery.
You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.
Something is on drawing power from the battery. Always connect the positive cable first and the negative cable last.
If a jump start will not start it then it is not the battery. You either have a short in the battery cable connection to the battery or the engine/starter or you have a bad starter. Test for a short in battery, battery Cables or connection. Trace where the positive battery cable connects to usually an electrical box on the inside of the engine compartment and put the positive jumper cable there while putting the negative jumper cable on a metal part of the engine (you are by-passing the battery and the battery cables completely). If it does not start now then you have a bad starter.
You can unlock the doors manually if you turn the key far enough. You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.
You can unlock the doors manually if you turn the key far enough. You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.
You can unlock the doors manually if you turn the key far enough. You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.
You can unlock the doors manually if you turn the key far enough. You can then open the hood and provide power to the vehicle with jumper cables and a donor car. If all else fails you can jack the vehicle up, support it on a jack-stand, and attach a red jumper cable to the starter positive red cable where it connects to the starter and then attach black cable to any metal place on the engine. You can use this procedure to charge the battery with either a battery charger for jumper cables from a donor vehicle.