Most of those pieces can be carved with a couple of decent knives Here, I'm going to go against my best advice, but this can be found at Amazon:

Here is a Mora knife that can be used as a roughout knife that can be purchased at Amazon.

While this knife is OK for hacking away large amounts of wood (not my first choice by far), you really need a good detail knife. Here is one I highly recommend.

As far as the strop goes, save you money. A thin piece of leather glued to a 8" x 2" (+ or -) board will work just as well as anything you purchase.