Go to the cheat menu in “extras” and enter the following codes:
100 reward points: GETSTUFF
100 reward points: DUCKETS
100 reward points: CROOKLYN
100 reward points: THESOURCE
100 reward points: NEWJACK

Unlockable: Songs
Bust by Outkast: BIGBOI
Chopshop by Baxter: CHOPPER
Comp by Comp: CHOCOCITY
Dragon House by Chiang: AKIRA
Get it Now by Bless: PLATINUMB
Afterhours by Nyne: LOYALTY
Koto by Chiang: GHOSTSHELL
Lil' Bro by Ricbyobyche: GONBETRUBL
Man Up by Sticky Fingaz: KIRKJONES
Move by Public Enemy: RESPECT
Original Gangster by Ice T: POWER
Sieze the day by Bless: SIEZE
Take a look at my life by Fat Joe: CARTAGENA
Anything Goes by CNN: MILITAIN
Walk with Me by Joe Budden: PUMP
Poppa Large by Ultramagnetic MCs: ULTRAMAG

Unlockable: Characters
Complete these tasks in story mode:
Beat Magic: Demolition Match
Beat Crack: Cage Match
Beat Sticky Fingaz: Inferno Match
Beat Chiang, Masa and Santos in Dragon House: Ring Out Match
Beat Trejo: Subway Match
Beat Crow: Window Match
Hint: Fighting Styles
Kick boxing is probably a good pick for beginners, followed by Streetfighting then either Wrestling or Submission as a third choice.
Martial Arts sounds neat, but is fairly hard to KO people without a blazing grapple or an environmental-based throw (like head into a TV set).