MOST modern appliances that use gas ignition (including dryers) no longer use a pilot. These appliances are now equipped with a burner assembly with an electric igniter. The following link explains igniters and how to access the them on a gas range:
http://www.fixya.com/support/r401858-replacing_oven_igniter_gas_rangeIf you are having ignition problems with one of the oven manifolds (bake or broil), it may be a simple matter of a weak or bad igniter. If BOTH manifolds are experiencing the same problem, you may have a bad regulator or electronic oven control (EOC) board. The EOC controls all your oven features.
The surface burners use an electrode type igniter for ignition. There is one mounted next to each surface burner assembly. They get their electric source from a spark module. If none of the surface igniters are working, you may have a bad spark module. If one single burner is not igniting, the problem is probably the electrode.
If you require additional assistance, please post back with your model number so that I may assist you better. The model number should be located on a name plate around the oven door, or lower drawer opening. Some manufacturers place the model number on the back of the operator console.
If you have any questions, please let me know. I hope this is helpful to you.