first you need Local Server for Web Development
there is lot of software: wamp, xampp, ampps, ... for me i work with wampserver64
when installation done
go to browser and write: http: //localhost/phpmyadmin/index.php
now check your default login and password which you can add after in all server files.
you have 2 file to edit :
go to : L2JDEV_SERVIDOR_LIVE \ login \ config
edit: loginserver.ini
and go to : L2JDEV_SERVIDOR_LIVE \ game \ config
edit: server.ini
change what is write in red square to what you have in your sql conexion.
don't