Are there shuttles fro the Wyndham to downtown & Titans stadium?

Yes. The week of the solar eclipse in August there was. Cost was $10 round trip. Pick up at Wyndham registration building - drop off near Ryman Aud. Once per hour. Once dropped off, you can walk to many places downtown and can walk across the walking bridge to get to the Titans football stadium. Cheaper than a cab or Uber or Lyft.

Yes

Yes they go downtown.

Not sure, but they do go to the down grand old opry.....

Yes, they do have low cost shuttles downtown, and also special deals on cab fare to the airport.

There was when we went for 4th of July. Dropped off by the Ryman. Very convenient

Nope

Yes, there's a minimal fee for a round-trip ride.

Absolutely