Yes, talents and shit like that will be 1.12 but content will be progressive; BGs (or honor) won't be out at launch it seems. However, "Battlegrounds and PvP rewards" could possibly be interpreted as "Battleground rewards and PvP rewards", though that's unlikely since it's worded "Battlegrounds" which speaks against that interpretation.
lild is right for the most part, the picture painted here that it's not possible to twink without a 60 is completely false.
1) Depending on bracket, most (almost all) classes can be super competitive in shit gear.
2) Everything is super cheap for the first month since a) people are desperate to get gold for mount so they'll sell bis items for no gold at all; b) no one has any gold; c) bfa noobs don't know what items sell for good.
3) Leveling an alt (rogue, hunter, mage) to 35-something will yield transmute gold and you're also able to farm a decent amount at that level.
4) People familiar with vanilla will be able to play the AH and profit as level 1.
5) Whoever said enchants will be expensive is wrong since enchants are progressive and only shit enchants will be out at launch, 15 agi wep/gloves, 30 SP etc. won't be out for months.
6) I bought gold on retail from TBC to legion and never got caught and iirc Blizz don't even permaban for that.
Best way to gear a twink would be to no-life the first 2-3 weeks and level a main to 40-something. Ideally you should be aware of what class you wanna twink and what bracket so that you can scout AH for relevant gear at start. After 2-3 weeks you should in general have all items needed.