I have everything to do this! A quick tip - don't pay a billion dollars for nail glitter! Go to Walmart, Kmart, a craft store, whatever, go to the kids section and get a verity pack of glitter! I got like 16 really cool colors for less than $3! If I had purchased 16 NAIL glitters - that would have broke the bank!
Just bear in mind that you should be comfortable with the nail art you choose for Halloween. Make sure that the nail art does not chip easily and will not damage your costume in any way. It would be bad if either one of your nails or your costume will get damaged when you are out there trick or treating.