Hello Moba Summoners! This is my first build guide ever written. For the Amazingly awesome Toto!
Please rate and comment so I know how I did.
I use Toto instead of Renekton in my build to save time and the name sounds nicer. :D
My guide/build is made for 3v3 i have not played 5v5 with Toto yet.

Pros

The best farming capabilities
Good chaser With his E skill
Tanky (with my build he's your tank)
No Mana
Ultimate can change the tide of the battle
Great initiator
Cons

Cooldowns are long
Squishy in early game
Late game hero

I like to go with Exhaust Ghost since Toto is very slow in the beginning of the game. And it helps when you're in a team battle and exhaust the AD carries or just someone who's low on HP and you're trying to chase them.

The Skill sequence for Toto to initiate or gank a player is:
W-E-Q-R-E
Ruthless Predator-Slice-Cull the Meek-Dominus-Dice

I use that skill sequence for everything. When I'm about to gank someone you want that stun so you can nuke them with your cull the meek(which should have it's fury bonus) and your ulti to regain more of that Fury for your dice when you're chasing them.
The most common outcomes i've had for that sequence is
1) they're dead
2)they're 1/4 or less HP
3)My ally got the kill

Laning Partners that've worked best are:
Olaf
Jax
Nasus
(anyone that can slow or stun)

Long Sword and a HP pot are a must for starting out. Ionian boots are a must for Toto with his high cool downs. Frozen Mallet is a great chasing weapon and i find myself losing to faster champs without it. After the Frozen Mallet I build Phantom Dancers Starting with the attack speed of the Dagger into the Zeal and eventually the Phantom Dancers. After the Phantom Dancers I build the Infinity Edge. and lastly I get the Sunfire cape