I'm having car problems - advice?

I went to Wal Mart for an oil change, and they told me I had a bad oil pan gasket and rearmain seal. What does that mean? What parts will I need to buy? And about how much will that cost me to fix?I'm having car problems - advice?well unless you are leaking oil then the gaskets are fine unless they tore them up, and the gaskets are just rubber or cork seals that go inbetween parts to make sure that they dont leak, and to buy them just go to an Oreillys and tell them the make, model, year, and motor size and tell them that you need a rearmain seal and an oilpan gasket, shouldnt be more than about $30