well, first I would go thru my pics and decide how I wanted to organize the album...by park, by character, etc. THEN (and this is MY FAVORITE part) I would go buy some paper!!!!! PAPER PAPER PAPER!! i LOVE Paper!
There's lots of fabulous Disney-themed things out there and even more stuff that's workable with Disney. For example, there's Jungle Leaves font that would go great with AK pics, Jungle Cruise. There are ideas books themed specifically to Disney with papers, cutouts included. Be sure to buy some plain cardstock, too, in coordinating colors-especially the reds, blacks, and white to go with the paper.
I also agree w/bananiem, I would purchase extras sparingly at first...I have yet to use a punch, corner rounder, embossing or rubber stamp. Only a few fibers and a couple charms. All you really need at first is paper and glue.
If you haven't been to twopeasinabucket.com you might want to check out the Peanut Gallery....hundreds and hundreds of fabulous layouts posted for inspiration. Read a few SB mags, too, like Creating Keepsakes, Making Memories, etc.--more ideas & inspiration. Pretty soon the SB supplies will start 'talking' to you when you go shopping. You'll start to get a feel for what you want. Don't let yourself feel overwhelmed...if you read the twopeas message board, you will see that there is no 'right' way and everybody scraps differently.
Actually, I lied...the first thing I would do (if I knew then what I know now) is ask myself if I really WANT another obsession! LOL