I just bought a beautiful pre-owned '99 RX from a local Lexus dealer. It's black outside with a tan interior. I've never owned a black vehicle before or had a *quality* leather interior. For those who have, any maintenace tips?

Specifically, how often do you need to wax the exterior and condition the leather? Any brands of cleaners to try or avoid? Just want to keep it looking good without doing any damage.

Your suggestions are appreciated.

Thanks!