It wont start at all on 2000 BMW 750iL

my 2000 750 il wont go.It was crossed the wrong way when jump started and when it started eventually it ran on about 3 cylinders.No throttle response,then wont start at all.Trans failsafe and abs lights came up.its now been sitting for the past 12 months,and i want to drive it again.Please help.

Asked by for the 2000 BMW 750iL
Call a tow truck, have it towed to a repair shop!
1 more answer , 2 more comments
You need to reflash your computer and key
Thank you but what does reflash mean? does this mean reboot/re -programme?