You don't have to use casting, you can use a jewler's saw, hammer, buffer and such to make flat things like bracelets, rings, pins, etc. I learned at a college. check out a beginner's course, it was awesome!
You should wear a hot pink belt under youe bust, hot pink eyeshadow, a lot of mascara and eyeliner, some big bangle bracelets in hot pink, silver and black, amd kewl gothic earings! You can buy this stuff on wetseal.com Good Luck!
Yes, silver pair of shoes is the most appropriate one for that dress. Also, silver bracelets, silver pair of earings, silver rings and silver head band if you like to wear one. Of course, don't forget the marching silver bag