I was a teen in a village (and loved it). and after years of urban living am back in a village with a 9 and 11 year old.
My key bit of advice would be that you really need to pick somewhere on a a bus route. It doesn't need to be frequent (it won't be, believe me), just as long as there are some. I lived about 12 miles from a city - with about 5 buses a day - which was just about enough to get me a weekend fix of Top Shop and the cinema - without having to rely on my mum. There is no way I would move to a place that had no buses.
If, like us, the kids go to a school which serves several villages, they will obviously make friends with kids from other villages and, ime, bus routes - ok to get into town, aren't so great for other villages - and this'll account for quite a bit of ferrying - but much of it will be quick - 10 mins each way. Ferrying to activities is a big feature of our lives with a 9 and 11 year old, but we take it on the chin - and it's not the worst thing in the world, compared with the benefits of village life.
I had a good group of friends in the village and mostly we were very independent. The kids/teens I know now in our village are a good bunch - quite involved in village life - they interact well with adults and seem pretty responsible. There is plenty of village-based sport (sadly mainly for boys though) and, in our case, lots of outdoorsy opportunities - climbing, mountain biking, horse riding.
The big fear is irresponsible driving on bendy lanes by 17 year olds (mainly boys). And the other consideration is the staggering cost of putting a 17 year old on your insurance. Apparently you're looking at 4 figures.