You'll get your rule book and all that stuff once you start training. The initial employment test is a basic aptitude test; math, problem solving, etc.
Of course, it never hurts to be prepared. http://www.railway-claim-services.com/1 ... -03-05.pdf
Good luck!
The initial test is reading aptitude and comprehension, but the questions are based on the rule book. You'll get a big rule book when/if you get hired along with all the other paperwork you need.