Collect the indicated number of Gold Bricks after completing all chapters of the listed episode to unlock the corresponding bonus:

Episode IV Character Bonus: 8 Gold Bricks
Episode IV Minikit Bonus: 8 Gold Bricks
Episode IV Super Story: 8 Gold Bricks
Episode V Character Bonus: 16 Gold Bricks
Episode V Minikit Bonus: 16 Gold Bricks
Episode V Super Story: 16 Gold Bricks
Episode VI Character Bonus: 32 Gold Bricks
Episode VI Minikit Bonus: 32 Gold Bricks
Episode VI Super Story: 32 Gold Bricks