I just got my 2012 CC back in December when my '09 GTI got totaled, so I'm not a huge expert on the car yet. But I'll pass on some of what I know, maybe it'll help you out.
The 2.0T is a pretty great engine, plenty of power for the CC. It only weighs a few hundred pounds more than my GTI with the same engine so it's got plenty of get up and go. The only major issue I've heard of with the 2.0T is carbon buildup which occasionally requires manual cleaning. However, my GTI had 60k on it and this CC has 85k on it, and neither one has ever showed symptoms of buildup.
Regarding transmissions, there's two, the 6spd DSG and the 6spd manual. The DSG requires routine fluid changes, I don't recall what intervals as I've always had manuals. From what I've read the DSG is reliable provided you keep up with these, although you may wanna do some additional research on it if you're interested in one. The 6spd manual is what I've got, and it's great. No issues and it's got a nice tall 6th gear--took a ~300 mile round trip in it just last weekend and got nearly 32 mpg with the cruise on 75 the whole time.
I'm not sure if all years of CC have Bluetooth. I do know that my 2012 is the Sport package (basic trim) and it's got Bluetooth, so my guess is it's standard on all CC years where Bluetooth was offered. Same with the touchscreen. The sunroof is not offered on Sport models, so if you want one you'll want to get a higher trim level.
A Google search came up with this regarding PZEV: "A partial zero emissions vehicle is a vehicle that has zero evaporative emissions from its fuel system, has a 15-year (or at least 150,000-mile) warranty on its emission-control components, and meets SULEV tailpipe-emission standards (Wikipedia)."
That's as much as I know, lol. You'll definitely have fun in a CC, it's a lot of fun to drive and super comfortable on trips. You can also get a great deal on one--my 2012 stickered for nearly 30k but I only paid 11k for it with 78k on the odometer. Go test drive some and see what options and features are available in your price range with your desired engine, transmission, etc. Good luck!