A car that cranks fine but doesn't start can be caused by a number of things.
The reason a car cranks but won't start could be due to no fuel, bad fuel pump, no spark, bad ignition coil, bad spark plugs, bad ignition control module, clogged fuel filter and a whole host of other things.
Try spraying some starting fluid into the throttle body to see if it starts and if it does then you have a fuel delivery problem and if it still doesn't start then something is wrong with the ignition and spark and you may need a mechanic to look at it if you're not mechanically inclined.