There are hardly any cablecars in Corsica, and the few that exist are only used in the winter, so you can forget about them for access. As far as I'm aware, there aren't really any 'recognised' scrambling routes, but as so much of the island is rough and rocky, you should have no problem making things up as you go. The only rule is not to climb anything that you can't get back down! On the other hand, remember that anywhere that people don't walk regularly is likely to be choked with thick, dense and horribly thorny 'maquis'. My guess is that you'll have to aim for places that have well-trodden routes, then use those routes to pick out likely-looking buttresses and ridges and see howfar you get. One handy tip... the higher you climb... the less maquis there is... and the easier it is to find clean rock. Deep in the valleys, there's usually too much rampant vegetation.
