Watch equivalent in zsh

Zsh has a lot of completion-related options (see man zshoptions under Completion). I think you're after setopt no_auto_menu and perhaps setopt bash_auto_list as well.

It is called Brace Expansion and is present also in zsh.

One important difference between bash and zsh is that in zsh parameter expansion is performed inside braces, but in bash this is not the case.