How is your battery ? Try a battery charger , battery jumpstarter pack , or a battery boost and see if it starts . ( also, it could be a battery cable connection )
The alternator might be the problem.
sounds like your in the market for a starter.
A no start condition where the starter just clicks.
Could be the Starter or the Transmission
It's probably your starter or maybe the sellonoid. Easy to check which it is.
starter, starter relay, battery, high resistance in batter/starter cabels just a few things that will cause this.
Dead battery? try jumping it off. bad starter solenoid? bad starter?
Clicking can mean a loose connection between battery and starter. Follow wire to starter and clean/tighten connector at starter.
It will probably be your starter motor Starter is out!
Try changing the starter.
your battery is flat Could be that your starter is dead. The clicking is the starter solenoid. That's a good thing that it is at least clicking. Replace the starter.
two very good possibilities are the battery, and the starter. its easy to test, just try to jump start it. if it still just clicks it needs a starter. if it starts its probably the battery.