Open a terminal and enter 'whereis apache2' and 'whereis mysql' to see if they are installed. If they are, go to Yast to configure. If they are not installed, go to Yast to download and install.
In opensuse, click on the lizard (lower left corner of taskbar), and just type 'yast' in the search window at the top. Or you can click the lizard, hold the mouse arrow over applications, click on 'system', click on 'configuration' then click 'administrator settings'. You will get a pop-up window asking for root password. Enter the password and Yast will open. Apache is under Network Services in the left window, click it and then click Http Server in the right window and read and follow the steps.
If you haven't installed apache or mysql before, I would recommend doing some reading before trying to set them up. There is a tremendous amount of information available for both on-line.