Nothing to add to the above except to say just be straight with the instructor as above, and then once lessons are underway keep giving the guy feedback... Hopefully as you go down the road the destination will seem more obvious. If he's showing you a 13th chord and you're more interested in how it's constructed - jump in and let him know...

A good teacher will cover scales/chords and the underlying theory (assuming the student wants it, which it seems you do).

There's actually a good deal of info for a teacher in your post - I'd seriously suggest printing it and handing it to him.... :)