I had purchased a WordPress web template and a designer worked on it and then uploaded it to the site.
The site needs to be modified and I figured I could do it myself. I downloaded all the files uploaded but cannot find any folders containing the index.html file.
I see a index.php file in every folder. What folder do I pull up to edit in order to change details on the homepage of the website?
index.php has equivalent functionality to index.html, except that it can contain PHP script. Look in those files. It will contain the HTML you are looking for.