It'd kind of help to know what brand you have. There are different lenses for each lens mount. If were talking general then a prime lens between 35mm and 60mm, for indoor/low light, and a telephoto zoom, which those can range from crap to fantastic.
I'm going to buy a DSLR camera. Right now I can afford two lenses. What two lenses would be a good starting point for a novice photo enthusiast?