Gold Brick Code
If you find that you are having a hard time collecting all 160 Gold Bricks in the game, you can input the cheat code "Gold81" at the Code Entry place in the Cantina. Once you have entered this code, you should have all the Gold Bricks in your possession. You will then be able to build a Stud Fountain outside of the Mos Eisely Cantina. This fountain will give you an infinite supply of studs to collect.
Unlockable Indiana Jones Character
To unlock the hidden Indiana Jones character, head to the Bonus Room inside the Cantina. You will then be asked to view certain previews. Select to watch the trailer for the "Lego Indiana Jones" game. Once you have watched the entire trailer, you will have Indiana Jones as a playable character to use in the Free Play levels.
Unlockable Skills
Entering two certain codes will unlock two skills -- the Disguise and the Force Grapple skill. Go to the Code Entry area of the Cantina. For the Disguise skill enter "BRJ437," and for the Force Grapple code, enter "CLZ738." The Disguise skill will allow you to pass by enemies without engaging in battle, and the Force Grapple will allow your Jedi and Sith characters leap to ledges using their Force skill.
Unlockable Bounty Hunter Mission
Head over to the Shop in the Cantina. If you have enough studs (you should if you have built the Stud Fountain) purchase all the Bounty Hunter characters such as Boba Fett and Jango Fett, or you can purchase Bomb Throwers. Once you have done this, you will have unlocked the Jabba the Hutt Bounty Hunter Mission room. This room will be located outside the Cantina for you to play.