We don't know yet - simple as that.
However, Toro had 2 unlockable outfits in the recent video (And no, it's not his preorder outfit. That'd be unlocked from the beginning in that version, as the one they played had the preoder costumes already.)
So, I'm thinking every character has at least 2 unlockable costumes.
if you watch the stream they have 4 an example is toro
4. Bistro toro
so its 1 default, 2 unlockables, and 1 preorder/maybe dlc
So far, that's the pattern. We know that at least, 'some' character get 2 unlockable costumes. The Bistro costume is NOT his preoder costume
Yup, pretty sure it's only three. On the "Customize" screen in the livestream it showed 3 costumes for Toro: Default Toro, Melodic Toro (unlockable, and Bistro Toro (pre-order bonus)
>.< No, that's not his preorder costume. I JUST posted my explanation for it like, 2 posts above.
It's still locked, and that specific game (I mean the individual account + game it's being played on) has the preorder costumes available already.
The Bistro costume was locked.