Further Configuration
To easily customize other common attributes of your server, such as setting the default map, default config, Logs/Demos API keys, etc., navigate to the "Startup" section of the server management panel.
When you make any changes to these values, they apply immediately without needing to save.
To implement the changes, simply restart your server back at the "Console" section of the server management panel.
TF2 servers can be customized further past this. In tf/cfg/server.cfg you will find the config that is automatically executed when the server is launched. This can be changed under the default config variable in the startup tab.
Your server will come default configured with the bare minimum options, including required commands and no random weapon/damage spread. If you want any other commands to execute feel free to add them. For example, tf_forced_holiday 2 can be used to enable Halloween effects.