I'm trying to make a first person shooter and I don't know were to start. Any tips,hints,or sripts would be very helpful.
Look at the Unity tutorials. There is a "3-step tutorial covering the complete production of a first person shooter".
Having bought the book, I can independently recommend Will Goldstone's book to be of great help for a 3D Shooter. While its not totally dedicated to the "shooter" aspect, it has enough general game development support to be really helpful.
Look At The Very Basic, Beginners Tutorial