In reply to davidcooke:
>"What are my chances with careful planning and training?"
Very good. Getting started isn't hard, the training and planning for summer walking is minimal. Navigation with a map and compass in hill fog being the most important skill to learn quickly. You'll get away without it over the summer by picking your hill and day carefully but eventually you'll find yourself alone, in the mist, without a path, so basic nagigation skills are a must.
You'll quickly spend a grand on gear but the stuff will then last for years.
You'll get this from an instructional book or the BMC video but to give you an idea of the sort of kit you should be researching, for summer I think the essensials are:
Boots: The Goretex fabric type are best to start with but eventually your need a second sturdier pair that take crampons for winter walking.
Rain jacket: A good brand (Berghaus, Northface, etc)Goretex fabric is a save bet.
Rucsak: 30-40 litre capacity with ice axe and crampon attachment points, again a good brand will last for years.
Gaitors: Again Goretex fabric is a safe bet.
Gloves: Gore-windstoper fabric works well.
Hat: Any old fleece material is good.
Fleece jacket: Pretty much anything'll work.
Wicking base layer: Helly Hanson type is good or Ice Breaker if you have the money.
Trousers: Any light-weight, fast drying man-made fabric
Compass: Basic model, Silva being a good brand.
Emergency Stuff: whistle, headtorch, survival bag, spare fleece jacket, spare fleece hat & spare fleece gloves.
Stuff for winter you'll need in the future:
Winter boots
Ice axe
Crampons
Waterproof over trousers or sallopetts
Bivi bag or Bothy shelter
Down jacket for emergency and "apres" use
Big waterproof mitts
Ski goggles
Dry bag (to line your rucsak)
Walking pole(s)
>"Do the peaks have pathways or tracks I would be able to use or would it be a case of climbing up sheer cliff faces."
Most have a path of one sorts or another. There's are a few harder ones, but even those are at the very very low end of difficulty on the rock climbing scale. By the time you get to those ones you'll know what your are up against so I wouldn't be too conserned as this stage.