I used to wear BDUs but after I was riven an old ratty *** set of Empire pants I never looked back.
My mom got me the Invert SS pants in digital camo for Christmas, they're great.
I'd say knee pads are a must though, most pants come with built in pads, but it only is there to supplement the knee pads that you'd wear seperately. The Redz pads I have right now work well.
Don't worry about a fancy jersey though, I prefer to play in my longsleeve shirts, and I usually throw a T-shirt over that. Right now I have a red T-shirt and I wear a T-shirt I got from my local skate shop years ago over the red shirt. In the summer I'll just wear a T-shirt, it gets too hot.
As for footwear I wear football cleats. Easy to run in and offer support for your ankle.