I do have a username and password, yet cannot make key changes through the dashboard. For ex. I have not been able to change the site header image. I've gone through the steps I've found online to how to do it, yet even though it shows that I've changed the header (via the dashboard), it has not effected the live site at all. I am a total newbie to wordpress but am taking courses so I can help my friend with his non-profit. The previous website administrator is no longer available and I cannot reach them. I've also tried looking for the site on Github and cannot find. Website is pc4ih.org. Any guidance would be GREATLY appreciated!
If you have FTP access than you can set password with
or via database if you have access to phpMyAdmin according to http://www.devlounge.net/publishing/reset-a-wordpress-password-from-phpmyadmin