A:AnswerYes. Gold SteelBook Edition includes the complete South Park: The Fractured But Whole game, plus the Season Pass, and more which is the SoT in it. Reports from the company also say base game includes it as well.
A:AnswerDanger Deck
Players will have to face the ultimate combat challenge in Doctor Timothy’s Danger Deck. They will be able to unlock exclusive costumes and artifacts. “Danger Deck” will be available in December 2017.
From Dusk till Casa Bonita
A new story where players will team up with The Coon and Mysterion to defeat a demonic presence at Casa Bonita. This content will be available in 2018.
Bring the Crunch
Will introduce a new story, including an all-new superhero class. It will be available in 2018.
it was all announced a few days ago, and easily google searched.
A:AnswerI'm sure that the code will be extended once the game is released. I do not think the promotion will go away as this is the same type of promotion that Dishonored 2 did with their original game.