Togepi does not evolve at a specific level. You have to get its friendship maxed out first*, then you level it up and it evolves. *=This is how you get a Pokemon's friendship up. 1. Carry it in your...
You have to get togepi as happy as it can in order for it to evolve. Or, You Could Get Some Rare Candies around in Poke Balls and they help your togepi evolve every time by one. Mine was at level 45...