Here is the link to the menus:
https://disneyworld.disney.go.com/dining/epcot/food-wine-marketplaces/
Click 'read more' to read the menu items. Usually the DIS will post pictures of the menu boards at each booth once the festival has started, and then you can see the prices. No idea where each booth will be located at this point, other than assuming the ones that are actually countries in Epcot will be within that country. When you go to Epcot there should be a festival map/info when you walk into the park. I assume it will all be online once the festival starts as well.
The Festival Passport can be picked up at the Festival Center--the old 'Horizons' building to the right of Mission Space. There is a Ghirardelli exhibit here where you can learn about chocolate making, buy chocolate, and in the past we've received a free sample of chocolate when we walked in. There are seminars you can pay to attend--you need advance reservations for them, a 'back to basics' one that I believe is still free, stuff to buy, etc. You're supposed to be able to pick up the festival passport at multiple locations, but they don't list the locations online.
The food/drink items are of a 'tasting' size.
There is also a free concert at the America Gardens Theater at 5:30, 6:45, and 8PM. Here is the concert list:
https://disneyworld.disney.go.com/entertainment/epcot/food-wine-eat-to-the-beat-concerts/
Oh, you can also pay with a Disney Gift Card/rewards card, credit card, cash, magicband.