In reply to The Bouldering Badger:
Buying second hand gear can work out really well. Take a look at the for sale/wanted forum on here. Yes, there is a risk of buying gear that is past its recommended lifespan but from experience the sellers on this board are genuine and happy to give a history of usage (eg, how old, how often it was used, has it taken falls, has it been in frequent contact with sea water). The olny thing I wouldn't buy 2nd hand would be 'soft' items like slings, ropes and harnesses because they have a shorter lifespan than 'hard' items and damage may be less obvious.
Otherwise, there are plenty of articles and past forum posts about what gear you will need to start out. Also, if you've not already done so, I'd recommend reading up on ropework, setting up belays, abseiling, etc and practicing before topping out your first trad lead. Hope you have a good first season.