I think my computer messed up

My husband always runs the gas till the last drop.
A few days ago it turned off on him as soon as she
got home. He brought gas and it wouldn't start.
Kept putting gas, a couple gallons at this point, but
wouldn't start. We drained the battery trying to
start it. We got juice from his sister's car and still
nothing. We left it alone till the next day, dead
battery. So we got another jumpstart from his
sister only to have the truck say unknown driver,
doesn't mark gas, radio stays on, a/c doesn't work,
doesn't mark battery power, or oil life. We had had
issues with the electric parts here and there before
but nothing major like this. Any suggestions??