Lexus ran out of gas and wont start up after i put gas in it

Put gas in it?

ran out of gas while it was warming up , I put gas back in it and turned the key a few time still wont start up

try your fuel pressure regulator.some time it can get damaged when there is no fuel in the system. may have stuck shut.

Try removing fuel filter, empty it and clean, try again, sometimes loose particals from bottom of tank may be picked up when ran dry

Today's not your day Lisa,now you have gas and still can't go.

take lose the hose running to air filter or take the hose loose from the throttle body and pour you a little gas in to the throttle body put the hose back on and try to start it,it should start

Sounds like a typical case of letting the car run dry out of fuel, you may want to try spraying starter fluid into the intake/air filter after allowing the key to be left on in the run position for a few seconds, this allows the fuel pump to fill the fuel lines with fuel, then try spraying a shot of start fliud if still no start you may have a more serious problem....fuel contamination...the bottom of the fuel tank may have sediment in it and when you let it go dry it pulled up the bad stuff and now it needs to be flushed.
New fuel filter, injector service, fuel tank drained/flushed and fuel lines drained.

Turn the key on and listen for the fuel pump to prime, you ran out of gas, if it was weak to begin with that may have finished it.

buy manual, check for fuel at motor

if you let car run out of gas.it over heat fuel pump some times it damages it.it wont start again.