I recently got a Tauros via wonder trade. It has anger point with it and I'm thinking about using Frost Breath on it and then it will max out its atk how do I get endure to ensure that I wont get KOed by my teammate that uses Frost Breath?
You'd have to use TM 58 from Gen IV which contains Endure, and transfer that Tauros over to XY which currently isn't possible. So you're going to have to wait for a bit. And get gen IV games. Or get one of your friends to help you. Or alternatively , use MrKijani's technique
Tauros can now learn Endure from TR26 in Generation VIII. Here are all the raids that can drop it.
The previous method still works (Teaching Tauros Endure from TM58 in Generation IV and transferring it).
Unfortunately, it cannot learn Endure.
However, it was once able to learn Endure in Generation IV, via TM58. Since you can't trade it back, obviously, your new Tauros will never learn Endure. Sorry. :(
Hope I helped. :) Source