Below lvl 10, if you watch videos and spend your hard-earned tokens wisely, you don't need to buy tokens It depends on your goal set for this game. If you want to be the strongest and beat other teams up easily, then buying token is a way. However, if you want to experience the game by winning not so easily, you can try to do it without buying tokens to see how it goes for you for these beginning levels, assuming you just start playing the game.