Newbie questions

I'm a new user and have some questions:

1. When I press Ctrl+C without a selection in order to copy the current line, the line is selected. Can I configure Idea to just copy, not select, like in Sublime Text and Visual Studio?
2. When I press Ctrl+V to paste a line copied as described in (1), the line is inserted at the caret position, which breaks the current line in two if the caret isn't positioned to the far left. Sublime Text and Visual Studio insert it before the current line instead. Can I configure Idea to do the same?
3. I can't type @ or $ into Idea's terminal. When I press the keys (AltGr+2 and AltGr+4 respectively), nothing happens. How can I fix it?
4. The Code menu says the shortcut for commenting out a line is Ctrl+Slash. My keyboard doesn't have a slash key, but I can type a slash with Shift+7. If I press Ctrl+Shift+7 I get a small "7" marker in the margin, but nothing is commented. What's wrong?

That's it for now, hopefully these issues are easy to fix or work around. I'm using Idea 14.0.1 on Windows 8.1.