ignition problem

I have a 1993 tempo, 2 door, 4.0 liter engine with 96000 miles on it and anytime the key is in the ignition i get that darn bong......bong.....bong from the buzzer letting me know the key is in it. no matter how long the trip. When the key is taken out and the doors are closed the lights inside stay on all the time. i disconnected the battery and reconnected it because i was told that could reset it i also unpluggled all the bulbs because reading around i heard some bad stories and used some common sense. anyways all i want to know if it sounds like an igniton switch problem or what? Im not sure if i should just replace the ignition switch and the cylinder and try it from there. I mean 30 bucks isnt much to lose if thats not the source of the problem.

Any feedback is greatly appreciated

Check with www.tempotopaz.com for answers.