Tricky one to answer as there are Munros and there are Munros
First up boots, winter boots are not only for the use with crampons, they are (or at least should) be better insulated. But looking up your current footwear it did say they are compatible with a C1 crampon, the boots being B1, basically the C number must be the same or lower than the B. You could opt for an instep crampon, these can fit any boot and usually have 6 points fitting just ahead of the heel plate, but given your current boot rating and that its comfortable and warm enough in winter I would favour a full B1 crampon, 10 or 12 points, mine are 10, generally considered a walking crampon, although it still has front points for steep terrain
Ice axes are to me the foremost piece of kit. Before the day of crampons (and still now) the axe (the adze blunt bit) would be used for cutting steps in steep slopes and also the sharp end, and still is, your means of arresting a slip on a fall/trip on a given slope. The key difference in winter on a snow slope (the harder the faster) compared to summer is that your slide will not come to a halt due to the grass/heather and you can slide significant distance and/or fall off a cliff at the end some distance from the original slip. Length of axe is a personal preference. Long shafts that are just shy of the floor when walking or shorter ??? Mine is short of the floor by about 8 inches as I believed that it will be used most when on a slope and hence the axe will be higher in use. Key thing with any axe is learn self arrest and has been said practice on a safe slope, it may save your life, certainly has mine
Lanyards for axes are also a preference and from recent discussions it appears that current thinking is against them. Personally I don't agree and have mine attached to a wrist. Discussions against say that having it flailing about as you slip can be dangerous and the need to swop hands, lanyard included, is time consuming etc. My lanyard is long enough to attach to one wrist and be able to swop hands with the axe without needing to change the lanyard over. For me the risk of losing the axe altogether carries far more risk than it stabbing me on the way down, if held correctly with practice. If you were to not have it attached and fell coming to rest but in a difficult situation you would now be without it
So your shopping list.
Boots you may be ok with what you have.
Crampons, given the choice between Instep and full, I would go for full but check compatibility with your boots.
Axe, essential and more essential practice. If I could only have one piece of winter hardware it would be the axe
You can go on courses, I did back in the 80's but didn't use my axe in anger until over 25 years later
It can be self taught by reading any of the excellent Moutaincraft books covering winter skills as can avalanche awareness too. In winter I observe avalanche forecasts and frequently check snow conditions (which can vary enormously across slopes and regions) and/or dig a test pit, which gives you the conditions as they are
