Personally I think a 36 LED light will be too bright in the front map light (i.e. blinding if you turn it on at night while driving), and not sure it will fit either. I've got a 6-LED one in there, and a 36-LED one in the central dome light.
Yes, BA9S is correct for the map light, and 31mm festoon for the dome light.
Can't help you with the aircon etc because I haven't done mine, not the sun visors either. I'm sure I've seen a posting previously about what LEDs for the sun visors though, I'll try and dig it out.