You get 1 skill and 1 attribute point each level. The highest level is presumably unlimited, but it takes a VERY long time to level up past level 30 (every new level takes as much time as all the levels before together, so level 30-31 is like level 1-30, 31-32 is like 1-31, which means 2x 1-30, etc.). The highest level someone currently has is believed to be 34.