Hyundai i30 2009

Hello I have two Hyundai i30 2009 first I have problem with turning off.Example I turn on and drive for 30-45 min then turn off the car.And try again to turn on, car turn on, but automatically turn off.

On second i30 I have a problem with yellow lamp(car and in car its key) its turned on that lamp.


Please can anyone tell me the solutions to solve following problems.

Thanks in advance