boxster won't start!

[blackboxster]

2000 boxster has a dead battery, this is the order of what I did and happened. I opend door but window did not go down like normal, got in car would not start, I pulled the outside emergency hood release opened hood hooked up external jump battery to start car, alarm went off I turned off with key fob, I tried to start the car all the lights in the car started flashing windows starting going up and down like when you open the door, heard a clunk clunk clunk from the starter. I thought the jump battery was not strong enough. I then tried to jump off my truck but lights, windows, and clunking noise again still won't start. I then disconected battery to reset computer for 3-4 min. tried to jump off truck again but still all lights inside flashing and windows moving and still will not start. please help me if you can!