I want to know how easy I will be able to find jobs in Thailand after I've completed my TEFL certificate. The only problem is I am 21 with no college degree. I have heard from various sources that it is easy to find employment, maybe not the most lucrative jobs, but something without a degree. If anyone has experience in this area PLEASE do respond.

Sorry, ask any Thai person.
You may check the following websites:

I'm sorry I can't answer your specific question but I can give you the benefit of some (similar) experience. I actually had the opposite situation to yours when I went off to Teach English as a Second Language (TESL) basically the same thing as Teaching English as Foreign Language (TEFL) in Japan. I had my college degree but no certification. I can tell that you I had little difficulty finding employment, whether at a Conversation School (my preferred choice) or a standard Public School. The reason is that Japan seems to place the emphasis on native English speakers who are well-educated and have a good command of the language. They are less concerned with specific classroom training.

However, as you are looking to teach in Thailand, it's quite possible they have a different approach. I was good friends with a British couple who taught at the same school I did in Japan who had just wrapped up a year of teaching English language in Thailand. Unfortunately, I've lost contact with them but my recollection is that they too had college degrees. For what it's worth, they really liked life in Thailand, though they confessed to being frustrated by the fact most of their students (and their families) were quite poor while they (the Brit teachers) were comparatively well-paid.

The situation in Japan is quite different, however. There, almost everyone makes a decent wage (they have an enormous middle class, unlike the increasingly stratified Thai economy) but as a teacher you may feel the pinch of a very tight budget because everything in Japan is so expensive.

Don't give up hope just yet. In addition to the links SFNDX left you, I'm attaching some websites that may help answer your question.