Forgot to mention some other things that I didn't include.
The most important being of course, a "ramrod" to clean the insides of your bores with. I never used wooden ones until I got into vintage percussion guns. They're nice to use especially because they can't mar the inside of your barrels or damage the bores.
But I had amassed many aluminum ones, or plastic coated ones from my prior (and still current) hobby or shooting modern rifles. They do the job well, just remember to use a bore guide that fits your weapon to prevent damaging the bores. The attendant cleaning patches should be cotton twill, again sized to your barrels. Chamber brushes and barrel brushes. I often use nothing stronger than plastic brushes, but for tough cleaning jobs I'll use bronze ones. NEVER NEVER use brushes made from stainless steel. NEVER! You run a serious risk of damaging the insides of your barrels and for no reason at all, i.e. your barrels will never be so dirty you'll need anything "stronger" than the aforementioned ones.
Grease. I expect a lot of people will have personal opinions on this one. For the hinge pin on my doubles I used Cleanzoil hinge pin grease but am now using Ken Owen's hinge pin lube since he gave it to me for free and he's very very smart when it comes to these things and the stuff seems to work very nicely. But you won't be disappointed with the Cleanzoil HingePin grease.
There are other areas that need just a little dab of grease but I advise you to do some reading about that. Michael McIntosh's writings are a good place to start.
The problem I have answering this post is that from the timbre of your question I assumed you were a novice, but I just noticed you've been a member here for 4 years, so I'll stop right now and apologize if I've bored/insulted you.
Peace - Marc