Q: Slight delay after engaging the starter before it starts and sometimes will not start at all

When I engage the switch the lights dim and I hear one click, sometimes there is a second or 2 delay then it will start after engaging the switch, sometimes it starts just fine and sometimes it will not start at all. sometimes it can take up to 4 or 5 try's taking the key all the way out each time.

My car has 152000 miles.
My car has an automatic transmission.