Keeps asking for code (TomTom says it's 0000) but that doesn't work although the TyTN does see the 720 device. How can I find out the real code, or better yet do away code altogether. Manual implies you can do this by not entering code at setup time, but even after removing and adding TomTom again I never get to a screen where that works.

Just use the other software to start your bluetooth ,that maybe work/