start out with the 1/2 pound of food--that should last a good while.
yep, the white supports are closet rod holders. i have a ton of them if you want some or can't find any locally (shoot me a pm)--i tried getting them at walmart but they always had only one or two sets at a time so i just bought a big box of them off of ebay.
real plants aren't better for the geckos in any way. if you do go with real plants go with something like pothos or ficus. i prefer fake plants because they are easier and can be scrubbed and/or replaced easily.