I’m new to use Eclipse, and I have some questions

1. I can increase the size of the map, turn the tiles greaters? it is for increasing the size of the sprites, them are very small. Or just turn the sprites biggers?

2. And how can I change the black background of the sprites? I have many sprites with black contour, and it not work with that background.

3. My game is about pokemon, how can I make the player change the class when make a higger level? I have a charmander, and when turn level 16, it changes to charmeleon. I need to do this manual or have a form to turn this automatic?

Sorry my english, I’m from Brazil.