If flown manually, autothrust on or off, to go around you just slam the levers forwards. There is no "TOGA button". You get full thrust and some nice upwardly pointing flight directors (even if they were switched off before you commanded TOGA). You are given guidance to keep you going straight ahead (G/A track) and SRS (speed reference system - gets you going up, safely).
As long as you reach the TOGA detent!
