Some of the keys baffled me too
The symbol that looks like
(edit: I'll get this right yet!)
means 'option'. It's on the same key as 'alt', to the left of the apple and hash-like-symbol key which mean command. Alt and option seem to be the same thing, essentially, as do apple and command (correct me if wrong, I'm a newbie too)
The one that looks something like
^ (not the eject one)
is 'Enter'. Apparently Macs often differentiate between "Return" (new line) and "Enter" (confirm a command) whilst PCs generally merge the two.
HTH as it took a lot of googling to find out what all the symbols were for