Late to the party (as usual) but a few comments:
My '11 Touareg now has about 83K and is going strong.
Consumer Reports has listed the current V6 version as having "average" reliability.
If you read what qualified as reliable in the "good old days", you can see that cars, in spite of their complexity, have gotten more reliable.
As a certifiable Medicare eligible old-guy, I have countless horror stories about the cars from back in the good old days (when reaching 100K miles was pretty much the upper limit).
I have an '05 Prius also, with about 100K. You can see which one I prefer to drive. Also have a Volt which falls between the two. It is so much quieter than the buzzy little Prius.
Maintenance costs in my Touareg haven't been excessive. Wear items, like tires, naturally wear out. If that's a problem order them from Tire Rack and save some bucks over the dealer. And add you own AdBlu purchased from PepBoys, it's much cheaper than the VW stuff.
The car is a joy to drive and, so far, has been quite reasonable to maintain.