Resin - I used Envirotex. Castin'Craft makes resin besides dyes but I have not used it. Envirotex is the brand that I know and have experience with.
Resin dyes - used Castin'Craft Transparent Dyes, note there is also Color Pigments from the same brand which is added along with the transparent dyes to make the colors opaque. I mention this so you are sure which one you are getting to start with. For now, start with the transparents and get a handle on the method without creating opaque colors (used more for lotion or shampoo bottles than perfumes).
Capsule Holders -two methods described
Capsules - several sizes available
Paper Towels
Plastic Cups - two sizes, small ones for measuring out the 2 equal parts of Envirotex before mixing and larger ones for mixing
Wooden stir sticks
Freezer Paper
Disposable Plastic Gloves
Qtips
Tweezers
Small Scissors
Plastic bags with ziplock top -needs to be heavier than sandwich bags

If you can't find the resin, dyes, or capsules locally - here are some internet links to specific pages with the items listed. If the links break or change due to their site updating over time the starting points to find them are listed below the specific page links.

envirotex supply link
resin dye supply link
empyt gel capsules source

www.dickblick.com -key words to search for - Envirotex, Castin'Craft Transparent Dyes
www.nowfoods.com -key words to search for - empty gel capsules