Question: how to unlock all characters in lego lord of the rings?
Answer: Aragorn. Aragorn is unlocked after completing the Pass of Caradhras which is the fourth story mission in the game.
Aragorn (Gondor Armor) ... 
Aragorn (Royal Armor) ... 
Arwen Evenstar (Ranger) ... 
Berserker. ... 
Bilbo Baggins. ... 
Bilbo Baggins (Old) ... 
Boromir.