How do you unlock tron in tron evolution psp?

no

The price of TRON: Evolution is $29.99 for both physical and PSN copies of the game:

Just found out myself. Go out of the game. From the PS3 network icon on the xross media bar, select "account management". Select redeem codes. Enter proption code.

yes you can at the begining of story mode

If you have a microphone, you can use whatever language you feel is most appropriate in the multiplayer section of TRON: Evolution. Disney urges you to keep it clean for the benefit of children...