there is no music player app in aokp, you have to download one from playstore.
to get the apk for camera, open the rom.zip with 7zip (or winrar or whatever), go to the system\app folder and extract the
using bluetooth from another rom will not work.
if you need Bluetooth that bad and don't want to use a sense-based ROM, your best bet
for now is the latest cyanogenmod 10.1 ROM.
post #1811 +#1856