If you want to go through walls and invulnerability, then you should download one of the admin scripts. Click the link below to see which suits you best:
If you need to open the console press ~ at the second top left corner of your keyboard. If your using an admin script, press either F1, F2, F3, or F4 whichever that opens the admin menu.
on German keyboards you have to press ^ to open the console which is right under the ESC key on those. hence top left corner. it equals the position of ~ on English keyboards.
and yeah, ~ is on the right side next to return on German keyboards.
sorry, I don't understand you. there is an alternative way to execute console commands if you don't manage to open the console: open the chat and enter: /your commands here
a / followed by the command(s) you want to execute.