Additional Taxi View:
Begin a new game and while the game is in progress press and hold L1 and R1, then press Circle to enter first person driving mode. Press Triangle to view from a wider angle. Press Square to see the speedometer.

Pedal Taxi:
Quickly press L1, R1, L1, R1, L1, R1 or L1 + R1, L1 + R1, L1 + R1, at the character selection screen. Then select your driver and instead of a driving a taxi they will be riding a bike.

Turn Off The Guiding Arrow:
Hold R1 and press Start before the character selection screen.

Unlock Another Day:
Press and hold R1 until you choose a taxi driver.

Unlock Expert Mode:
Press and hold L1 and R1, then press Start before you see the character selection screen.