No, the goron tunic does not protect you from the fire that Dampe throws at you, or from any fire-based enemies like flaming keese. All it does is take away the time limit in fire dungeons.
If you stop the rolling Goron in Goron City, he will tell you his father is Darunia and that he went to the Fire Temple; he will give you the Goron Tunic if you talk to him enough.
you can buy it, but a goron gives it to you for free
In order to get the tunic WITHOUT buying it, you need to stop rolling Goron in Goron City with a Bomb or Bombchu and calm the Goron down. If the tunic is eaten by a Like Like, you can buy it from the Goron Shop for 200 Rupees.
Goron City store sells Goron Tunic (red). Zora's Domain store sells Zora Tunic (blue). They are 200 rupees each.
There is a small Goron in Goron city if you bomb him he will give you the Goron tunic and open in entrance to the fire temple
To get the Goron Tunic in Ocarina of Time, return to Goron City as an adult after beating the Forest Temple. Go down to the 2nd floor (I think) and bomb the small goron rolling around. He's kind of hard to get, but when you do get him, he sits on the ground and starts whinng. Talk to him and after a long and boring conversation about the Fire Temple and Volvagia, he'll tell you how to get into the Fire Temple and will give you the Goron Tunic. Another way is to get the largest wallet and buy it from the general store, but I don't think that's possible at that point in the game unless you use a cheat.
in goron village destroy the huge demon
You can buy a Fire Tunic in the Goron store as an adult for 200 rupees
There are two main ways of obtaining this tunic. One is to stop the small Goron rolling around Goron City with a bomb when Link is an adult, and the other is to purchase it for 200 rupees from the Goron Shop. If you purchase it from the shop first, the rolling Goron won't even mention anything about a tunic. Hope that helps Remember to have fun and enjoy :)
stop the rolling goron in the second floor with a bomb, he will give you the red tunic, opening darainas room and the goron shop =D
Inside death mountain crater. u can enter from goron city after you have the goron tunic go behind the statue in darunia's main room
First kill all the golden skutullas in kakariko village then go to the cursed house, there will now be a boy somewhere, talk to him and you will get the Adults wallet, get 200 rupees and go to moron city(i mean goron city.), get in the shop and buy the goron tunic. I think this should work cos sorry i havent tryed this.