Seems like everything is wrong! 2001 Sunfire!

I have a 2001 sunfire with 73,000 mi 2.2L. Just recently I hvae had alot fo problems with it, it makes a clicking sound when I go to start it but then wont start. Some times I don't have this problem at all. I replaced the starter/battery/alternator/starter wires/ put in a starter relay. And none of them seem to have fixed it, it still has the problem more often then not. Also recently, I was driving (arpox 20mph) and all of the indicator lights came on and once and a second after that happened all of the gages went completly down to zero except the odometer. Then go off after like 3 seconds. And about everyother time I get in my car the theft system light and the service light comes on after I have been driving it for like 5-10mins, Please help me I have nooo idea what is wrong with my car! :(