That would be a cinchy cosplay...
You've got a year to haunt thrift stores- a 3/4 length T-shirt in that color might be found, or a full long-sleeved one that can be hemmed up. Or find a lighter color one and dye it blue with RIT (provided it's cotton).
Jacket might be a little harder to find but you could do it, or close to it. If you want to make it, it seems like a black twill fabric- if you take the picture into JoAnn's, someone there might be able to make recommendations.
Pants are just pants.
Belt can also be gotten at Goodwill; it just needs a buckle, which can be fashioned from Sculpey and painted to look like metal. Necklace could also be fashioned from Sculpey and sanded smooth after cooking, then painted.
Not sure about the little skull boxes. Painted cardboard maybe- from cereal boxes or better from white foamcore that's been painted.
Hope that's a start!
