Here is a list of the in-game characters, and their codes, that if entered correctly will put the up for sale at the counter in the Mos Eisley Cantina.

Vehicles:
Imperial Shuttle– HUT845
TIE Interceptor– INT729
Tri Fighter– AAB123
TIE Fighter- DBH897
Zam's Speeder- UUU875

Characters:
R2D2- EVILR2
Boss Nass- HHY697
Captain Tarpals- QRN714
Count Dooku- DDD748
Darth Maul- EUK421
Ewok- EWK785
General Grevious- PMN576
Greedo- ZZR636
IG-88- GIJ989
Jango Fett- KLJ897
Stormtrooper- NBN431
Watto- PLL967

Note- These codes will put the following characters up for sale, they must still be purchased.

On episode one chapter 2 (Discovery on Kamino) once the game starts keep following the guy after you fix the light until you meet Jango, follow Jango until he runs outside and starts to set bombs on the ground. Then fly across with r2 and open the door. He then will start a machine which makes robots appear that shoot lasers at you. To make this work correctly you will need perfect deflect bolts red brick (episode 2 chapter 4: this is located under the metal thing that has to be destroyed with a thermal detonator, once destroyed a built-it will appear. Build the thing and the block will appear, this is easiest done before you rescue Padme in free play because you do not have to worry about many enemies. This is where you find perfect deflect.) And you will also need stud magnet (episode 2 chapter 1: when you leave the first area that you are trapped behind force fields, turn to your right. Along the side of a building there will be antenna's that have red on the top of them. Shoot at them until they turn green. Once they turn green a red balloon will appear from below you, shoot it with a torpedo/bomb and you will get the brick stud magnet.) Okay (after you have stud magnet and perfect deflect) the robots that come out of the ceiling will keep coming after you until you close the door with r2 (don't close it.) Then just leave the room and the robots will shoot at you but it will deflect back, then kill them and they will drop studs, then your stud magnet will attract them to you =). Then just leave the room until you think you have enough. PS: This works better if you have score x2, x4, x6, x8, and x10. Hope this infinite money cheat helped. =)