You really will need to get another battery for your camcorder. The batteries supplied with most, if not all Sony camcorders last less than an hour. I have never bothered with a charger, but if you do get several batteries it might be handy as you can leave one on charge while out useing the cam.
Other required accessories are a good case for carrying it around and plenty of tapes. If buying several tapes then about the best prices are from
www.pricebuster.org.uk but they do add about £7 for p&p so you need to order several to get the price down. I would suggest you take the cam to a local camera shop and try it in some cases to see what you require. No good getting one online and the cam doesn't fit or bounces around inside.
Mark.