Ok so everything should works. The guy at local dealer told me that the front lift would have no effects but there were chances to cancel some options if I lift the rear.
I'm asking because that's whats my local Toyota dealer told me. Like I said they never lift a recent 4runner, in fact they are not selling a lot of 4runner at all.
Before you let them do it... Try and find an installer that's a little more handi-capable. Perhaps an off road shop or hot rod shop might be better options.