new here today

hey folks, need a little guidance here. hope this is something familiar to somebody.
2008 tacoma was run really low on fuel. Parked overnight in driveway on an incline.
front end facing downhill. will not stay running this morning. It starts for a few seconds then dies and the alarm starts going off. I put 2 gallons of new gas in it but nothing so far. help?

 

Any large puddles under your truck? Maybe bad fuel injectors? Could be tons of stuff.

 

It sounds like the little bit of fuel that was in there moved to the front of the tank. And ran away from the fuel pickup. No big deal, add more fuel turn the ignition to on and let is sit for a minute or so so the fuel pump can reprime.

Then try to start.