I would highly reccomend listening to the Ven. Bhikkhu Bodhi's talks on the Majjhima Nikaya because they are both very good and also free. Here's a link:http://bodhimonastery.org/a-systematic- ... ikaya.html
One thing that you should keep in mind is that there are a lot of different traditions of meditation withing Theravada Buddhism. Some of the more major ones are the Mahasi Sayadaw tradition, the Pa Auk Sayadaw tradition, the U Ba Khin tradition (also called the Goenka tradition), and the Thai Forest tradition. Do you have any one of those in mind?
If you want to meditate according to the Mahasi Sayadaw tradition, here is a link to a playlist of videos by an excellent teacher, the Ven. Yuttadhammo:http://www.youtube.com/playlist?list=PL ... ature=plcp
If you want to try out the Thai Forest tradition, try out this video:http://www.youtube.com/watch?v=MTWDEzbRza4
If you want to study the Buddhist scriptures, try this website. It has a selection of very helpful suttas:http://www.accesstoinsight.org/index.html