You'll want a squeegee, a full allen key set, O-rings (actually made out of polyurethane, and you WILL need them because if one blows in your marker, it won't work and then you get to watch all the rest of the games that day on the sidelines), lotta people recommend 5in1 oil, but just buy a bottle of ACI or Airlube or something from your local pro shop. You'll of course need a hopper, but instead of the evo, I'd recommend the 12v Rev (cheaper, and more than sufficient for your marker) a pair of JT pro series pants has a squeegee holder, built in shin/knee guards(so you get pants, a squeegee holder and knee guards all in one) and cargo pockets (very comfy, good pants) you might want a jersey, you'll need a mask of course, you might want to get a spring kit, I don't wear gloves, but if you do the new Dye ones look really comfy and protective, you'll probably eventually want a pack, I have a JT slampack with Planet pods, it's a pretty good setup, but it all depends on what's comfortable for ya and where ya play, rags and water.
That should be everything you need to play and keep up your new marker