How do you thread a sewing machine?

Answer 1

Stick the thread through the needle -- from front to back.

Answer 2

If you thread the machine from the spool of thread through the needle, doing nothing in between, nor making sure there's a bobbin that's all filled and threaded, you'll accomplish nothing. All the specifics depend on your particular sewing machine; read the directions.

This may be of some use, but may also have some differences from what your machine's directions say.
http://www.wikihow.com/Thread-a-Sewing-Machine