So, I want to do some html work on some php files, but can't get them to display on my local server. I paid someone to build the site for me and so I don't understand php and database work much at all. So, I want to do the front end code and have them complete the pages doing the remaining database work. I was able to get the home page to display locally on my computer using WAMP, but can't get the other pages to display. I've attached a screen shot of what my issue is when I click on a link to another one of the pages.
You could have copied/pasted the error message onto here, we didn't need a screenshot ...
Still, your problem initially seems to lie with your database.
Mysql governs itself and which user can do what with a database called "mysql" where permissions are stored. You will have to either set up a user called 'nff' with the correct permissions, or, find out your default root password and locate where the database settings are stored in your application and alter the credentials from 'nff' to root or whoever you have granted access to all your tables to. That is the swift and dirty way to get permission to access and do things.