Making blog look like my website

Hello,

I have purchased a website template and on the blog page is a sample blog. The creator said the following:

The blog part has only the HTML/JS/CSS, so need to integrate it with a blog system, such as wordpress. Thanks!

How would i go about integrating these files with the wordpress files i have uploaded?

The creator said he will make a tutorial, but that was over a year ago!

Any help is much appreciated,

Thank you.

Andy