how do I do a tune on Avalon,Toyota 1995 on 1998 Toyota Avalon

I have asked for help only to get other answers except what i ask for.I just want to know how to do the tune up because I can only see three plugs.

Asked by for the 1998 Toyota Avalon
you must pull the intake manifold to gain access to remaning or rear plugs.
Also it's not a job for a novice, even with a manual, still want to do it?