I'd heard that there is a free little legend, yet i don't see it anywhere in the client. Is there something we need to do to unlock it or have they just not rolled them out yet?
All I know is that missions for TFT will come next week, so if it's where you obtain the free little legends, you'll have to wait a bit.
That's correct, the various rewards you can earn are distributed through the mission system effectively so they'll be available once that's switched on.