No. 13 is made by, or rather marketed by, Thompson Center, should be available at any good black powder/muzzleloading supplier. Ballistol is made by, well, Ballistol. It's a little harder to find - you might have to look in the fishing supplies section. Both are mineral oil based cleaning solvents that are very good at cleaning the bore between shots in the field and even at home (although I prefer the soap and water for the latter). Many people, myself included for a few years, used Ballistol as a rust preventative between shooting sessions. I also use it as a dry patch lube, diluted 1:6 with water, then dried.
Make a nipple pick out of a thin piece of wire.
Patch jag is a jag with two thin coiled wires that will fish a loose patch out of the bore.
Screw jag has a wood screw or machine screw type of thread that you can use to screw into a ball that's stuck in the bore in the event of a failure to fire.
Scraper jag has a scraper on the end, kind of a thick blade you can use to scrape crud off the face of the breech plug.
Cleaning jag has ridges around the circumference that hold a cleaning patch when you push it into the bore.