Here is the full list of all 10 ULTRATORO achievements.
Get a golden A medal in any level
Get a glowing S medal in any level
Just buy a vehicle in a car shop
Beat the Boss "Bora"
Beat the boss "Gomur"
Beat the boss "Leader"
Buy all the cars available
Create a new level in the editor
Play a level that you subscribed in the workshop
Beat the extra level unlocked by buying all the cars