If you're talking about the first one that comes up, they have a "how to use" section. http://www.cheapvaporizer.com/product.instructions.php

I think that answered all of your questions, i.e. when to apply flame and how to get in the vapor.

As for the other guy, you can get cheap non-electric vaporizers, but some of the best ones are electronic, including the volcano. Just look around at online headshops.