One cold Morning after work I got in my car.

One cold morning after work I got in my car tried to start but had trouble, after a couple forced tries and my foot on the pedal the car started. When igot home 20miles later the check engine came on. Now afyer turning off the car I hear a tick tick. Tick noise around the throttle. I have trouble starting. But will start. As well as now the light won't go off also thecar idles crazy high like its going to blow up. When in park or nuetral and the throttle sticks now it feels like it. When im braking I can feel the friction like the cars wanting to move forward for no reason Idk where to start everything is expensive and would like to start with the cheapest fixx first.