In reply to Removed UserJGrange365:
At the risk of being repeating what's already been said, I'll have a go:
> - Are there a lot of top roping routes?
Almost all of them, if you want. Gritstone especially.
> - Do they have bolted anchors already in place?
Some of the limestone does, but you don't want to visit the Peak from elsewhere for your first climbing trip and climb in those places. They're just not where you go to see the Peak at its best. Also even on those bolted crags the anchors at the top aren't always easy or safe to get to other than by leading the route. (And you probably shouldn't even think about visiting most of those crags without helmets btw.)
Lots of gritstone crags have trees and/or boulders at the top that make it easy to rig up your own top rope anchor with nothing more than a few slings and screwgates, and maybe a rigging rope (especially if you want to belay from the bottom). If you add a few nuts and learn how to use them you're good to go just about anywhere.
I don't have a video to recommend. (I'm sure there are some good ones though.) As above, if there are a bunch of you I'd suggest you club together and get an MIA to join you for at least the first day to take you through it.
> - Any suggestions on the rope length that would be needed
50m is plenty for most of the grit, all of it if you're willing to belay from the top from time to time. 70m is enough to belay at the bottom of just about any route you're at all likely to want to toprope.
About a 15m or so low-stretch rigging rope would be v handy for rigging top rope anchors to belay from the bottom.
Edit: Ok, not a troll.
Post edited at 13:09