Here is the full list of all 10 TED achievements worth 0 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox One.
Watched your first talk
Watched 50 hours of talks
Searched for a talk
Watched a playlist
Watched 3 related talks in a row
Watched 100 hours of talks
Watched 5 playlists
Watched 10 playlists
Watched 200 hours of talks
Watched 500 hours of talks