starting problem...

previously i had a coil problem, fixed that and car was fine for a while. about a month later, my car would “click” when i tried to start the car, it wouldn’t crank at all. it would be sporatically. sometimes it would not start and do the “click” thing, and then there was times where all it would do is crank and crank but not turn over. during this time, my alternator went bad, i guess it could be from a bad battery or a bad starter or just the fact that the alternator was old. so i replaced it with my LS, and it was fine, but still had the starting problem. could this “click” just be the sign of a bad starter? or could it be something else? thanks