1) simply use png files with transparent backgrounds... the question has already been asked a few days ago, in this forum.
2)what do you mean by "views" ?
3) search it by yourself. You can add rpg-style functions like giving the player the possibility to upgrade his car, a money system, boosts, weapons etc.
You'd better learn how to use the software before you try to create an original game. There's a bunch of tutorials in the wiki.