Chewbacker isn't in the Lego Star Wars 3 beta.
You can not unlock Captain Typho on Lego Star Wars 3 Beta.
To unlock Greedo in Lego Star Wars 3 Beta hit enter and type heshotfirst.
You can not get Grand Moff Tarkin in Lego Star Wars 3 Beta. Trust me, I have every character.
To get Gredo on Lego Star Wars 3 Beta hit enter before you type heshotfirst (you don't half to type it in bold).
lucasarts.com
You can't get Jabba the Hutt in Lego Star Wars 3, but you can get him on Lego star Wars 3 Beta if you unlock all the other characters first.
you cant
you have to poo
heshotfirst
the station is on the star destroyer
you can buy it for 1,000,000 studs>