Use YouTube. There are several videos that teach the numbers and some basic phrases (see Resources). Some of these videos are taught by native speakers and will allow you to not only hear the pronunciation but also to see how the person is moving their lips, which is useful when you are first learning.
Use the Turkey Travel Planner (see Resources). This site provides Turkish numbers from zero to a trillion. Not only do they give you the Turkish spelling, but they also give you the phonetic pronunciation for the numbers as well. This site also has lots of useful tips about traveling through Turkey, such as when the best time to go is, where to go, where to stay and the general costs of things.
Go to Learn Practical Turkish (see Resources). This site also provides numbers from zero to a trillion. It also provides audio files of the numbers being pronounced and gives you examples of the numbers being used in a sentence. In addition to numbers, the site provides many other fundamental tenets of the language as well, including important idioms, verbs and pronunciation exercises. This site will help you to learn the basics of the language.
Use the The Travel Linguist (see Resources). If you want a more structured method of learning this site provides several books, DVDs and software programs for learning the language. It also sells the Pimsleur audio cassette tape series, which teaches languages strictly through listening exercises. The prices range on these materials from $8.99 to $350, as of 2011.