By public transport
The way to Lagorce is long. It is far from major cities. You have to head for Vallon Pont d'Arc, which you can reach via a TER  bus that runs around 4 times a day from Montelimar and Valence train stations, both of which have a TGV train service.
From Avignon take the LR 15: AVIGNON - VALLON PONT D'ARC - RUOMS - AUBENAS.
From Vallon you can walk through the woody hills, or along the old way (Route Vieille de Lagorce) to Lagorce or you can hitch along the new road.
From Alés you can take the A13  to Barjac, from where you can hitch (which you can also do from Alés, of course).
or - from Alés - you can take the LR 13: ALES - LES VANS - JOYEUSE - LARGENTIERE - AUBENAS - then return with the LR 15 from Aubenas back down to Vallon Pont d'Arc, but Alés has a train station that makes access from further afield good (Nimes, Beziers, Carcassone, Montpellier, Marseilles - all of which have cheap flights), from which you can also hitch north up to Vallon.
Go to some road planner online and type in: Lagorce 07150, Ardeche.
Walk in the beautiful hills, following the Sentier Botanique in wild boar territory and enjoy fantastic views and local wildlife.
By public transport
There is no public transport inside Lagorce, it is just a little village perched on a cliff side, which looks a bit like a sleeping Stegosaurus, and in the Valley of Salastre, which leads to the Valley of Ibis, where there are fantastic pools in spring for swimming.
It is common and you get picked up.
There are many great places to visit by car.
Go for walks, hang out, meet some locals, old and young. Walk through Chadafaud, (Lagorce) in the medieval part of the village. Walk in the beautiful hills, following the Sentier_Botanique in wild boar territory and enjoy fantastic views and local wildlife, which is really great in Spring. April, May and June is the very best time to visit for that, when the Salastre still runs and acts as a breeding ground for zillions of frogs and you can hear the nightingales sing, watch the owls fly through the night. It is also nice to visit in autumn (late August to October), when the summer heat fades, and of course for the fully hot South of France experience, when the water is warm in the many rivers, come in the high season. The restaurants are full of Dutch, German, French, Italian and other tourists, as well as the locals.
The local grocery shop is run by a young, friendly couple.
The commune has been growing steadily in the last few years, due to the success of a local, organic cosmetics factory, Melvita, which is 5 km north of Lagorce in the direction of Aubenas (in Marquenoux), so especially in the season there are a few shops and also locals selling organically grown vegetables, honey and other things. Ask in the grocery shop for more information.
There are two restaurants, Le Tilleul and Le Cheval Blanc, both of which have bars.
See above. There are also two vineyards just across the valley, in Ibie, both of which produce "vin naturel", which is all natural, sulphite free wine, no chemicals, no yeast added, just grapes naturally fermented. They are part of an informal network of eight producers in the region, who have all turned to traditional wine making.
Cheval Blanc on the main street that runs through the village is a hotel. There are a few B&B's and there are some amazing houses for rent in the medievalesque old part of the village, which sits on the cliff-side. It has narrow, uneven paths up and down the cliff in a maze often leaving wandering tourists from the tour buses that pass through Lagorce in the season.
Following the Salastre river towards the Ibie will take you to Camping de l'Ibie, which is a collection of nice wooden huts, some with great views over vineyards and others with great views of wild hill sides. The campsite is itself on a hill and features a swimming pool at the very top. Spectacular spot for a swim.
Leave nothing but footprints...