starting next season will be the first time i have ever raced on a track and i am planning on racing in most races next season. to make long story short, i bought an already built 1989 nissan 240sx ITA and am happy with the car and cant wait for the season to start.

the few questions i have are mostly related to how often do you guys change various fluids. it would be great if i can get some advice on...

the type (weight) of engine oil to use?
how often should i replace it?
what brake fluid should i use?
any specifics about the type of coolant and how often should that be flushed?
how about the radiator hoses, is it good enough to change these just once a year?

any other advice you guys can give me and maybe list some things which i should look out for will be greatly appreciated.

thanks.