All drivers, courses, and taxis:
At the character select screen, hold L + R + X + Y + click Left stick + click Right stick on controllers 1 and 4 simultaneously.

Expert mode:
At the Driver select screen, hold White + Black and press A. No destination or arrow indicators will appear in this mode.

Disable arrow indicators:
At the Driver select screen, hold White and press A.

Disable destination indicator:
At the Driver select screen, hold Black and press A.

Prizes:
Beat Level 1 - Unlocks the course maps for West Coast, Glitter Oasis, and Small Apple.
Beat Level 2 - Unlocks the bike, stroller, and carriage to use as vehicles.
Beat Level 3 - Unlocks ''Another Day'' mode.
Beat Level SS - Unlocks all 12 drivers for each course.

Thanks to Revolution readers Katacomb, Donny Bailey and Martin Brody!