Well, seeing as how toons are only 4*, 6*, 7* and 8*, you won't have a great deal of options with Just them, you will need some 3* (at least) support, depending on what Synchros you want to bring out. I think the concept is cute (tuners and toons). Well, let's start a build:
Obviously, you will need
3x Toon World and
3x Toon Table of Contents
You will need non-Toon World-dependant Monsters, so
2x Toon Cannon Soldier
3x Toon Gemini Elf
3x Toon Goblin Attack Force
x Toon Masked Sorcerer? (if equipped with Unstable Evolution, can be a real pain)
Then the Toon World-Dependant Heavy Hitters:
x Toon Dark magician Girl/Toon Summoned Skull
x Blue-Eyes Toon Dragon
Vengeful Bog Spirit will even out the fact that Toons can't attack the same turn they are summoned (well, except for Toon Dark Magician Girl--she's special!!).
Toon Defense is good, but will need support from Rainbow Life, Hallowed Life Barrier or something.
Actually, there are several good Toon Decks out there, you could just modify them to work with tuners and Synchros. I would focus on Synchros that can negate, so as to protect your Toon World.
Anyway....let's see what you got...
