2007 G6 GT possible purchase
The brakes should be fine after you replace the pads. Sounds like the existing ones are worn out.
The G6 will be a great first car for your daughter. Just be easy on the tranny, seems to be a tad easy to break. Also, plan on replacing one or two door lock actuators as those were designed very poorly. One more thing, the headlights are guaranteed to haze pretty quick, if they aren't already, so plan on either resurfacing or replacing them at some point.
Nice Talon by the way! I love those cars.