I built a 50 cal hawkins from a kit when I was in high school.
I bought a bluing kit from a gun shop, it was a lot of work and the results were poor at best. What I would recomend is to prep the barrel and get it ready for blueing then take it to a reputable gunsmith for the bluing process.
Another option is traditional "browning" and I understand that this is a much easier process for the do-it yourselfer???
I made my flinter from the same kit that you are considering. They sure do make a fine rifle. Bluing is a little bit more tricky than browning a barrel. First you have to degreese your barrel repeatedly. I used dish soap and hot water, over and over. When I thought it was done, I cleaned it one more time. Then I used a cold bluing kit and submerged the barrel. It turned out quit well.
Moose calling can get confusing to some, but cow calling is your main tool when moose hunting. If you go out and buy moose calls I would say you're wasting your money unless it is the birch bark cone. I find most store bought moose calls sounding worse than puffing a grunt your hands to make the call. You can roll up a piece of birch bark in a cone shape to use as a call and spend your money on a video that teaches you the basics of a cow call. A milk jug or a coffee can with a hole and a rope...