So yes, judging from the google translate there's 2 serperate potions. One potion that will unlock a job to 60 (not including DRK AST MCH or any Stormblood jobs) and it costs 25,000 yen or 25 USD.

Then the second potion is the "main story clear" potion which sets 3.5s quest completion flag and opens up every dungeon raid etc as if you had done all the content in the game. Also 25USD roughly. So for a new player coming to the game wanting to skip, thats about 50 dollars.