Its because your battery is "dead" OR your battery terminals aren't making good connection to the battery post they may need tightening
Check battery, charge it or change it. Dead battery.
Replace it.
YES. replace only the one that is cliking.
if it clicks only when turning check to see if front axles are bad, if it clicks all the time check bearings
My limited knowledge tells me it may be the soleniod(sp?) or alternator. When my 87 Sable had that prob my friend get underneath the hood and 1)I turned the key in the ignition and held it engaged. 2)He tapped the alternator w/ a hammer. This allowed the clicking sound to happen. If I recall correctly, the clicking sound while knocking the alt meant the alt was bad. If no clicking happens when knocking the alt then the soleniod is bad. The soleniod is a lot easier to replace so hope it's that. I accept no responsibility if something breaks or this only makes the prob worse :)
turkey! =) turkey! =) turkey! :-) turkey! :-)
check the relay
frog
A ticking or clicking sound is probably lifter noise, the valves need adjusting
Have the alternator checked.
Bad wheel bearings usually cause a grinding noise, and are known to only cause it when turning.
Most likely it's the starter, but check it out further. Most likely I think it is the battery is bad or a bad connection to the battery ,positive or neg. termenals or maybe both. But if the battery is down real low even if you try to jump it the bad battery might draw to much from the one you are jumping it from and still just make the clicking sound and not start. Matter of fact I bet it's not the starter and would bet mony on it! Please just check the battery first !