We don't get involved with costs here because there's way too many variables. Basic tune-ups have been a thing of the past for 20 years. At 109,000 miles you're due for new spark plugs, perhaps an air filter, fuel filter, and cabin air filter. Some mechanics will recommend an injector cleaning. Your owner's manual might list a transmission fluid and filter change and oil change.
Stabilitrack is a computerized system that controls the braking and steering to prevent skids.