I just bought a website coded in PHP, Which I know nothing about. I am familiar with HTML but not PHP, How do I change the content text? And the layout images?
We don't know anything about the script you bought. Maybe the text is in a database, or maybe in a template. Since you bought it, I can imagine that you're not willing to post the code, but I'm afraid we won't be able to help you without it. Have a look if there's a folder called "templates" or "themes" or something similar. Browse a bit through yours files. Changing the layout (images) has nothing much to do with PHP, so you probably can do that yourself...
You may also want to see if the script that you bought has any documentation (either included or on the seller's website) which sometimes helps with modifications. Beyond that, I would suggest that you Google for PHP Tutorials and take a couple of hours to acquaint yourself with the language. It's a really simple language to learn, so it shouldn't take long to get a basic working knowledge.
its possible that, since php can be weaves in arround html code, that its just in the files themselves. take a look through, and see if the content is in any of the files