2001 chevy cavalier warning light problems?

i recently had a lot of work done on my cavalier. a new sub frame was put in, a new timing belt, spark plugs, gaskets, fuel filter, brake line was flush. Most of the work was done because the first person to work on the car screwed up a lot of things. but that's another story. today I was driving and the TRAC OFF light came on, followed by THEFT SYSTEM and SERVICE. I parked the car, shut it off and turned it on. no lights. i drove a few feet, the THEFT SYSTEM and the SERVICE light came on and then the BRAKE light and one other light ( i couldn't catch what it was) blinked on and off and those other two stood on...any ideas what's going on?