1st change your config files to use the name and password you've set up for MySql (mangos,mangos). No if your MySql is on the same machine as your trying to run Mangos from you can leave the remote turned off...Now you'll need to set the .conf for mangos, realm, and ScriptDev2 .conf and in mangos.conf there are multiple lines you need to do this with...example:
LoginDatabaseInfo = "127.0.0.1;3306;mangos;mangos;realmd"
WorldDatabaseInfo = "127.0.0.1;3306;mangos;mangos;mangos"
CharacterDatabaseInfo = "127.0.0.1;3306;mangos;mangos;characters"
also when you first installed MySql there was an acount you set up with root as the username and you chose a password....you can also use these in the configs, example
LoginDatabaseInfo = "127.0.0.1;3306;root;yourpassword;realmd"
WorldDatabaseInfo = "127.0.0.1;3306;root;yourpassword;mangos"
CharacterDatabaseInfo = "127.0.0.1;3306;root;yourpassword;characters"
I hope this helps.