ive done every spartan race in the uk so far and this is the best i can advise, if its hot, shirtless, but november wont be so i advise a long sleeve compression top, anything remotely baggy will get heavy with water/mud and snag and pull on barbed wire,
i would reccomend regular running shorts for the same reasons, ive seen people try with tights or long combat shorts even, they will just weight you down.
ive tried gloves but i dont reccomend them, they get wet and muddy and offer nothing by the 3rd or 4th obsticle, they just get in the way, keep your hands wet and cold and cant be dried or cleaned of mud mis race. waste of time, i didtched mine on both occasions within a few miles.
on the feet i'd wear either old trail shoes that you dont mind getting rid of at the end, OR something newer if you have them that is designed for mud and rivers and rocks that you can jet wash when you get home, like inov8's or salomons (i run them in the speedcross)
have fun, i certainly do.