You need level 26 (4310 points) to get Springfield skin.
Characters skin (Elite) = 90 points (180 points for ones with accessories).
Characters skin (Purple) = 40 points (70 points for ones with accessories).
Weapon (Elite) = 12 points
Weapon (Purple) = 6 points
Attachment Skins (Elite) = 4 points
Attachment Skins (Purple) = 2 points
Titles = 2 points
Avatar Boarder = 2 points
Avatar Icon = 2 points

Count them bros, how many points do you have now?