I have a 1997 Ford Taurus. Yesterday I went to start my car?

I have a 1997 Ford Taurus. Yesterday I went to start my car?

Added (1). I have a 1997 Ford Taurus. Yesterday I went to start my car. Lights and radio came on but it won't turn over and start. My ignition lock cylinder was very loose when turning the key and when I tried to turn it off the lights stayed on. Tried replacing the lock cylinder today but it did not make a difference. Any idea of what it could be?

Low battery, dirty cables.
have your battery tested.

How old is your battery? It may be time for a new one.