1) 38 characters. 17(!) of which were locked. (Bringing the roster to a grand total of 55).
To unlock the characters you HAD to pay an additional £20 to unlock the entire pack (Both Tekken and SF side)
5 of these charatcers: Cole, Turo, Kuro, Megaman and Pacman are PS3 exclusive and WILL NEVER be on the Xbox/PC.
*** Capcom a few months ago stated that even though Megaman and Pacman aren't console specific (Like Cole from InFamous and Turo/Kuro the Playstation mascots), both of those characters will NEVER publicly be released to Xbox owners. They will be forever locked on the Xbox version

2)Each character comes their default costumes and 2 additional costumes. Default costumes are for everyone but the 2 alternate costumes are locked. This brings you to another £20(ish). As each character has 2, this means there is a total of 100 locked costumes.

3)The game also has somewhere around 300 single gems for you to equip. 245 single gems (attack, defense, speed, stamina etc) with 60 assist gems. However 150 of these gems are disc locked and you MUST pay to use them. Meaning you only have 150 available to you. Another £20

4) The game only gives you 4 colours(yes you read that, I am talking about colours). Everyone has one colour, an alternate and black/white. Boring I know
But the total amount of colours that are DLC is an pathetic 2600(ish). I'm off by a few but that's each character and their individual colour slots. The colour packs themselves around another £20 which means so far you've spent an additional £60 on content you already own.
But there's still more

5) They locked combos. The game allows you to to perform auto-combos. I hate them but noobs use them. Each character has around 5 so we're talking 250 locked auto-combos which I think is around £10. If think if the conversion works out right, those in America pay an additional $180 for content that was in your initial purchase for the $60. See the this also adds to the fact that SFxT was a crap game in general.