Don't use the Admin button to log in. Go to the accounts table of your database, find your account, and set the status to 255. From the on, that account is your GM account and will have access to all GM commands.
To view the list of commands, type "#help" in game. For help with a specific command, such as #summon, type "#help summon".
Also, if you're after item IDs, just check out
Lucy. The item IDs there match the ones in the database. Or, use "#finditem Blade of Carnage" in game to find items.