Hey Lorraine,
Was in Biarritz for 3 nights August 2005 - its gorgeous. Stayed in a small family-run hotel / guesthouse just a minute walk from the small beach in the centre of Biarritz called Hotel Roses Trianon. At that time it cost €75 per night (for 2, double room, breakfast of croissants and bread included). The location was fabulous - I think I found the hotel on trip-advisor.com, very plain, but just what was needed. Biarritz itself s really lovely. Not a typical resort - I think it had its heyday in the '50's but it nicer than a lot of more popular resorts. We didn't hire a car, getting aroun the town itself is walkable. If you are there for onger you might need a car to travle further to nearby towns like Bayonne, but we didn't go there. The train system is quite good over there. Biarritz is great for surf too, and has 2 big beaches and loads of beachside restaurants.
All in all would highly recommend as a holiday spot.
S