from what i'm reading google ftw btw, to unlock the radio you must get the unlock sequence from a dealership, and only after proving ones ownership of said car, so looks like you will have to find a dealer
but the code might be in your manual, bust it out. Should be able to access by pressing the minute button then 000 should apear.
Press the minute again to make the last two didgits to your code # then press the Hour button to make the first didgits match your code.
After you enterd you code press AM-FM and if done right SEC or something should be displayed.
oh let it be noted, if you fail 8 times, you must reset it by leaving your key in the ignition for 1 hour than it will reset your attempts.