You have a Chromebook and you seem to be missing lots of keys? Don’t worry. In a few days you’ll get by without any problems using a few keyboard shortcuts:
ctrl + alt + / – Display all shortcuts
alt + 1 to alt + 0 – F1 to F10
alt + backspace – Delete
ctrl + space – Change language
alt + click – Right-click
alt + up – Page Up
alt + down – Page Down
A (probably) complete list is available here.