Change your key fob batteries first if you haven't done since you got the car,Halfords will probably do it cheap, if you can't change the bats yourself(you buy them off the shelf,they are all listed).DON'T look for problems with the car itself until you do this,it costs coppers should be done anyway,and may resolve your problem.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.