The idling and starter are two different problems.
For the idling, get the throttle body cleaned and it should be ok.
For the starter, if it won't crank, check for power to starter solenoid with ignition in cranked position.
If there is supply, you need to check the starter again.
If no power supply, check ignition to starter output power, if there is power, check relay for power supply.
If no power out, the ignition switch is faulty.
Check if the gear shift drive position lights are working, if not it might be the inhibitor switch at the trans that is faulty.
Saturday, January 19th, 2019 AT 5:11 PM