Battery could be low. I remember my blazer the other day, the starter would click click and the battery had just been put on a charger after being 6 feet under with nothing turning on. Try getting a battery charger where you can plug it in and hooking it up to the battery terminals. + to + and - to -.
The clicking could mean the battery is very low or you may need a new starter. That clicking is the starter not wanting to turn over. So try charging the battery or if you cant charge it with a car battery charger try jumping it with another vehicle. If so leave the jumper cables connected to both vehicles and leave the other vehicle run for 5 minutes and then try to start it. Its what I would do!