In the top left corner you should see the word Registration, just click that and follow the rest of the steps.

No, the administrator decides that or not.

Chat is on the Chat/Updates Board on the side. Unfortunately, we do not have chat now.

You can log out with the Log Out link at the top of the page. It could end up on the bottom of the page. But right now it is at the top.

You mouse over Nintendo Products under the menu and mouse over the system you want then click it.