What camera and lens is best? Well, what can you afford and what do you need? A Canon 1D X mkII? A Nikon D5? Most DSLRs are good enough.
A 70-200mm lens is usually a great place to start and almost every sports photographer has one in their bag. Do you need a 600mm prime lens? Or is a wide lens better for your sport?
It is not always about what you have, but it's about how you use it, and how to get the most from it. I started off with a Canon 20D, with a 70-200mm lens. Lenses last and are an investment. Camera bodies change. So, with lenses, buy once and buy right. It is better to save and get the right lens than to spend, sell and buy the upgrade. Could you buy a 70-200mm f/4 lens? Sure. But, if you shoot under lights, then you will really be better off with the 70-200mm f/2.8 lens. Saving is worthwhile. And, don't forget to consider buying 2nd hand. Good lenses like the prime lenses and 70-200mm f/2.8 don't come up for sale very often, but when they do, it is something you should consider.
RTFM - Read The Manual !!! This way you will know where the settings are, in the camera. It will help you quickly change settings, when needed.
Settings you will need to know and use -