Might be too hot though. The trick is finding the jumpsuit. Need washing though - that fireproof stuff marinates over time. We added a vest made from quilting fabric, and a pair of boots from a thrift store. This requires a bit more effort.
Wigs can be expensive, and there are hundreds of styles.
Invest in just the elements you need. Darth Maul probably takes at least an hour or two to apply, not including the horns. If you really want to be authentic you can buy colored contact lenses, but I've heard that these hurt after a while and can tear up your eyes. You can customize the lightsaber and blaster toys available at TRU to look more realistic. All you need is a free evening, acrylic model paint or enamel, and a couple of brushes. .