I would say yes, but the Internet can't really give you all the answers. You should really get in some and test it for yourself. Perhaps a local meeting, either TIPEC or PCGB. They're all friendly.
6'6", first porsche experience was a 996 targa. Plenty of room. Only issue maybe with foot hovering over the clutch there won't be much room between your knee and the steering wheel. Same as a 997 in that respect.
As above, should be fine but beware the aforementioned knee/steering wheel interface. You need to sit in one. If you are long in body I'd say youll fit.
I'm 6'4 and long in the leg and manage fine. Although I have the CD holder removed which gives me a little more legroom and stops my knee from hitting the steering wheel.