QUOTE(greyshadow @ Nov 25 2013, 11:19 AM)
I think I'm only about 4 hours in
taking my own sweet sweet time to explore
and playing carefully not to die, and lost all of my rented gadgets

btw, how to kill the annoying fire breathing centaurs on the mountain?

almost KOed by them few times
If you've reached Lorule:
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Go to the turtle rock dungeon (the fire dungeon, you'll need the ice rod), somewhere in the dungeon, you can get the hylian shield, which will prevent magic damage like the fire those centaur blast.
If not, then just try to avoid them, and keep hitting them non stop (better if you corner them) until they die.