Most of my cosplay friends do colored contacts, but they're also the ones who also either win BEST COSTUME at the contests or are the judges. I could never spend that much time and money on costumes.
Heck, the outfit I'm working on for my con (THIS WEEKEND AHHHH) all but the skirt was from my closet/eBay.
Shoes are always a pain, I tend to just hit up my local thrift shops and budget shoe stores and see what's "close enough." Honestly, you'd be fine with (comfortable!) black or brown dress shoes IMO.