Currently I am level 10.
Leagues:
Won- 6 times (Level 1,3,4,5,6,9)
Runner up- 2 times (Level 2,8)
3rd place- 1 times (Level 7)
Champions league:
Won- 2 times (Level 3,4)
3rd place- 3 times (Level 2,5,9)
Cup:
Very horrible experience. My friend (4 level higher) always kicks me out in Playoffs.
When i was level 9, i had 6 6* players. 11 5* players and 1 4* players.
I achieved all this without spending a single penny on tokens.
So my conclusion is that u don't really need to buy tokens. U just need to study the market behavior and bid for players at the right time. I usually get the player for 1 or 2 tokens.