Can I open the menu with keyboard? With PC, alt-something opens the something in the main menu.
Does Mac have similar function? For example, is there a way to open View menu as if I click it?
Try CtrlF2 - that should highlight the Apple-symbol on the main menubar.

edit: The cursor keys and Enter then allow you to navigate, drill-down and ultimately select an item - just as you can on Windows.

also - can't claim credit for this, I learnt it here on the site! What are your favorite Mac OS X keyboard shortcuts?