Buick La Crosse Engine Stall While Driving

I've Been Having Issues With My Car Turning Off. As Soon As I Put It In Reverse Or Drive It Cuts Off Completely Or My Battery Light...

The Car Listed Above Will Stay Running After Pressing The Off Button. Everything Else Powers Down Including Radio, Dash Interior And...

My Car Wouldn't Start Without A Jump, Though The Battery Was Only A Few Months Old. I Had The Battery Replaced And Drove 2 Blocks When...