In reply to Taer:
Sometimes I can't believe what I read - £300+ each for boots and 'pons? Nonsense.
You can get a set of used G10s or Monte Rosa (or literally ANY 10-point crampon) and you'll be fine for £50.
Boots-wise, this time of year you can use standard leather B1 boots with some warm socks. I used Mammut Mountain Trail GTX for many an early winter walk. All of this will set you back £200 if you are unlucky and incapable of using the internet to look for deals. I now use La Sportival Nepals & some Camp 10-points for walks and that still only cost me £250 - yes, the boots were on mega sale.
But don't buy - rent! Cotswold in Ft Bill will rent you Nepals and G12s and Axe for £12 a day. Not that an axe is any use on the tourist path, or if you don't know how to use one.
You say "I realise this looks very junior for looking at Ben Nevis and it is a dangerous mountain to attempt with the level of experience, however that's why I'm trying to do the research before hand..."
Don't overthink things, you're not going up Everest, the Tourist Path itself is a doddle (if a long, dull, soul crushing trudge of a doddle) which is routinely done by people who have never been up a mountain in their lives. There are much more technically difficult walks around. The Ben may be tall, but from the pony track side it's just a very tall lump - sorry if this sounds a bit negative, but you'll see when you get there!
What you SHOULD be concerned about is making sure you can navigate on/off the summit in poor vis. Study the map well, get the leaflet from Nevisport (think it's an MCoS one) which shows the gullies and route.
There's no snow now anyway, and almost certainly won't be at the end of Oct.
All the best, and hope you get some nice clear weather for it. I've been lucky and always been able to pick my days up the Ben at short notice.
Post edited at 17:44