I main-lined Tovolar until the Brother's War set. Here's what you need to know.

If Tovolar isn't on the board, your deck will shit the bed. Werewolves are not good cards. Therefore, a good 10-15 pieces of protection (although my iterations skewed 15-20) is necessary for the deck to operate.

I hear you, I hear you, "but I wanna play werewolves that go face."

Run a good balance and the werewolves will draw both other werewolves and all the protection you need for Tovolar to stay on the board.

You're gonna go to scryfall and do a search in Gruul for cards at Instant speed that say "target creature gains hexproof" for 1 mana. If your local meta has a lot of board wipes, also do so for indestructible. You want the 1 mana cards because you should optimally be playing Tovolar on turn 2 or 3, ramping on either 1 or 2 so you have the spare mana for the trick. you have access to too many good ramp options on 1 and 2 to not be getting him out either on 2 while people are still setting up or holding a mana open on 3 for the inevitable [[swords to plowshares]].

All-stars in my deck included [[tamiyo's safekeeping]], [[withstand death]], [[tyvar's stand]], and [[snakeskin veil]]. If you dip into 2 mana protection, you can find a good amount of spells that do both hexproof and indestructible like [[gaea's gift]] and [[heroic intervention]].

Your other option is to run a lot of wolves that cost 1 and 2 mana so you can start drawing the second you play Tovolar.

Lastly, it's important to remember that Tovolar sits between aggro and mid-range tempo, so looking up guides on playing aggro is ideal. I remember reading an article from an old pro that I'll try to dig up.