As far as CocoCay, Mike has covered the food. As for any of the "extras", look at all the excursions. If it is listed there (waterpark, snorkel equipment etc.) then it costs.
Included in fare places to eat on Wonder include; Café Promenade, El Loco Fresh, Park Café, Boardwalk Dog House, Solarium Bistro, Sorrento's Pizza, Windjammer Buffet, Main Dining Room, and the soft serve ice cream on the pool deck. Breakfast only at Johnny Rockets.
The app is good about showing a "$" next to events and venues that cost extra.