The Father of the Enlightened Starter Set has EVERYTHING from the Posse Box PLUS a Wild West Exodus Rules and Gubbins Set, which contains:

A Softback A5 Rulebook
Condition Tokens
Blast and Torrent Templates
4 x D10 Dice
1 x Action Card Deck
1 x Adventure Card Deck

Miniatures are supplied unpainted and assembly may be required.