to be honest, you need to get it off the car.
the rotors flake after a while.
the fluid should be changed right away considering it probably never has been.
the coupler might have play in it, its kinda to be expected.
start the car, let it idle, and pop the hood and take the engine cover off, listen for bearing noise or a rocks tumbling noise.
rocks is the coupler. they're cheapish from ZZP or ebay. $20 or so plus fluid ($5 a bottle at your local dealer, you'll need two bottles.
To be frank, you'll want to replace the LIM gaskets, valve cover gaskets, coolant elbows, spark plugs, wires, air filter, fuel filter, tranny pan drop and filter change, supercharger fluid and coupler, t-stat, coolant change, oil change, brake fluid, power steering fluid, etc, as soon as you get the thing.
Unless you know the previous owner has done any of these recently.
