Well it sounds like the battery, but i doubt the battery would just die like that unless it was something else. Either that or it's a shitty battery. If you jump start it, make sure you let it run for a good while, then when you turn it off. Make sure you've got someone with leads handy, try turning it on again, if it doesn't do anything then it could be something more serious like the alternator (or belts). When you turn the ignition on does anything come on at all ? If not then i doubt it isn't the starter motor. Although if the fuel pump is coming on then it may not be the battery. I don't know.
But can you like turn anything on ? Like does the instruments light up ? Or the radio ?