check the battery,check the starter, see if their both good. It's the battery, if all it does is click. The clicking is the starter trying to start but not having enough electricity.
You need a new battery!
The starter solenoid/relay switch is going bad. Eventually, it will just click and not start.
you need a new batt.
Battery dead
if there is a single click when you turn the key i would lean toward a starter being bad if there is multiple rapid clicks then i would lean toward a battery
Sounds like a starter problem. you can have a garage test it for you. Or you can test it yourself. Have you tried to bump start it?
Dead battery or a bad connection to the battery.
sounds like the battery is dead, take the battery to a shop that can load test it
cant turn the key ignition on my 1996 aerostar ford
Does it turn over? Does it have spark? Fuel?
I would check your charging system. If you turn over your key and your starter just clicks, it is usually a low battery charge or your starter is out. I would suggest jumping off your vehicle and taking it to autozone and have them do a charging test for free.
if it does not turn over and no clicking noise but headlights on, check start fuse and relay if it doesnt turn over and clicks probable starter solenoid