Is there any shortcut to copy the path of the current directory in Total Commander?
Also, is it possible to select or highlight the address bar with a keyboard shortcut?
You can indeed copy the path of any file or folder you are viewing in any of the panes.
CTRL+P will add the current directory path to the address bar.
You can also get individual files' paths. Select the files you want to get the path from, click Mark>Copy Names With Path To Clipboard.
You can even add a new button to the toolbar which activates this command if you use this function very often. Add a new button to the toolbar, and assign it this command:
Another option for easy access is to map a custom keyboard shortcut to this function. This is done in Configuration>Misc.
As for a shortcut to focus on the command line, there is no built in shortcut to do it, but you can again assign a new button or keyboard shortcut to the command
Home, then Shift+F6.
As molgar / randy-skretka said, and also Ctrl+P but use Shift+← and Shift+→ to go to command line and cut with Ctrl+X.
because that also works in Brief and Thumbnail View 'mode', not only in Full (extra: see available modes with Shift+F1).
Ctrl+P and then ← OR → (arrow keys) to copy the current directory to the command line and then select it for you. Then just Ctrl+C copy.
Use your Home key to put you over the [..] notation at the top of the directory listing. That's the parent directory. Then use Shift+F6 to focus on and highlight the address bar (edit it if you need to!).
I don't think there are keyboard shortcuts to either of the functions.
A list of TC hotkeys can be found here: http://www.keyxl.com/aaa8055/84/Total-Commander-keyboard-shortcuts.htm
There is a way to create custom hotkeys for functions in TC (for all available commands) or even for custom commands. Information can be found here and here. You may be able to create your desired shortcuts there.