These keys are for the XBox. Simple experimentation should tell you what the similar keys are for your own game station if it's not an XBox! :)

Left Thumbstick - moving
Dir pad left - fighting mode
Dir pad up - normal mode
Dir pad right - shooting mode

FIGHTING MODE
left thumbstick - move
Right thumbstick - camera
A - kick
X - punch
Y - jump kick
B - grapple/throw/pick up weapon
Right trigger (tap) - draw guns
White - block

SHOOTING MODE
Left thumbstick - move
Right thumbstick - camera
A (hold) - take cover
X - punch
Y (tap) - roll (in given direction)
Y (press) - jump/dive (")
Y (hold) - slow mo jump/dive (")
B - pick up weapon / grab hostage
R trigger - fire weapon
R trigger (hold/rel) - burst fire/ full auto
Black - reload pistols / drop auto weapons

DRIVING MODE
Left thumbstick - steer l/r
Right thumbstick - accelerate/brake
A - accelerate
X - brake
B - hand brake
Y - rear view
L trigger - get in/out of car
R trigger - fire weapon
Dir pad L - siren on/off
Dir pad R - car horn
Dir pad down - change view

right joystick B to use health packs (on walls and such) during mission

True Crime - Streets of LA Walkthrough


True Crime - Streets of LA Review