03 tb wont start

I have a 03 TB and the other day it would not start. It did not turn over or anything. I tried to start it again and it started just fine. As i started to drive it stalled on me, I put it in nuetral and it started back up. Later down the road the ABS light came on and then the rpm's jumped up and it stalled again but this time the brake light came on and the monitor said "Service Brake System". I put car in park, checked parking brake by pulling up and turning back off, started car right back up again. Brake light was off and ABS went off shortly down the road. It has not started right away and has stalled on me when accelerating couple times after that. I was told it could possibly be the fuel filter so I replaced that. Things were running great for a few days then suddenly stalled again yesterday while leaving a stop light. Then today it took a couple of times turning the key to start through out the day. This evening I started it, turned back off tried again and nothing, only this time I noticed even though it does not turn over at all or make any sounds(lights and dash does still come on) the tack and the speedometer needles bounce around for about 5 seconds. Now it won't start at all and the "Service Brake System" has come on again on one of the tries.

Make sure your battery connections are good, after that you probably will need a dealers help with this, ignitions switches have been problematic as well as a tsb on a harness problem.

thanks for the help on the reply i figured that was what it was going to be took it to the dealers to get it fixed said it was going to be 260.00 and that included the diagnostic check that was 70.00 is that a fair price

fogot to tell you in last reply it was the ignition switch