They have the wrench, the center cap remover (but like I said you can make one with a coat hanger) and the radio keys are another tool if you ever plan on removing your radio from the car.
Cheers!
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1999 Ocean Blue Metallic Boxster - blueboxster.com
You don't need a whole lot of specialized tools for general maintenance. Torx, reverse Torx and a nice set of allen keys should do it. You can get that oil filter wrench at Auto Zone for something like 6 bucks but it won't be cast or have the Porsche logo on it. Check in over at Renntech.org as well. They have loads of tech info.