Jroxas

I have a early model 2004 525i with no bluetooth and no navigation. I would like both if possible. From what i read about the bluetooth, i need a newer tcu and it will need to be programmed. If i get a used one i might not need to get it programmed. Is this true? As for the navigation, is there anyway to add this in? I love my car but i drive a lot for work and both of these features would be nice.