There is a class in your area, Lowndesboro, AL on Feb 25 & 26th. See Alabama Adult Trapping Workshop online and register at
http://www.outdooralabama.com/alabama-adult-trapping-workshopThat course would be the best way to be introduced to trappers and trapping in your area.
You can use speed dip on your traps with or without spray painting them prior to using the Full Metal Jacket speed dip.
The traps will stink like oil and they rust very quickly if set outdoors. The stink will cause the coyotes to dig up or avoid the trap.
Traps require degreasing and usually letting them sit buried in dirt for a few weeks will form a light coat of rust that helps with etching the surface in preparation for paint or speed dip.
Traps don't come ready to use. A lot of prep work goes into getting them ready for the trap line. Some people dye them in walnut hulls to turn them black then they dip them in wax to remove smells and keep them lubricated and protected.
I degreased mine, buried them, used EvapoRust to de-rust them, then speed dipped them in Full Metal Jacket. The color is metal to rust. It's preference, what you think is going to give you the edge. I don't trap as much as I watch YouTube trappers, MeatTrapper, WolferNation, Expand A Pan, Coon Creek Outdoors, and TheWildNorth.
The MB550 will be the way to go, as long as you're sure that no one will steal your traps. They are the more expensive option for coyote traps. You may want to use Duke traps if you aren't sure whether trap theft is possible.
Online, I use FntPost.com, macesfursandtraplinesupplies.com, minntrapprod.com, expandapantraps.com, and southernsnares.com
For lures, my favorites are from Elk River Lures, elkriverlures.com
Join the Alabama Trappers and Predator Control Association,
http://www.atpca.org/