Any Foxpro caller with the TX-1000 remote is what you want. There are three basic calls to consider: the Fusion which is small and has a lot of features (many of which you may never need or use), and can be made louder with the addition of another speaker. The Shockwave is bigger and heavier, but has the most features. The CS24C does not have as many features, but is loud, clear and easy to learn to use.
I would skip the decoy-for now. Get it if you need it later. A decoy can scare away as many coyotes as it attracts, and in moderately thick cover, a coyote can charge the decoy and be back in cover in the blink of an eye.
