Does anyone know where these pink chain-mail are?
(armor,legging,chain glove)

I only know these items exist by useing summoner save editor.But i never found them in the game.

Most of this equipment comes through the completion of sidequests. Summoner Platemail is given for completing the King of Tanis quest. Leggings, and chainmail come from other quests. I have gotten them all, but don't remember from where. Sorry.

I'm not to sure on where to get the Summoners plate, and any of the other ones. But the gloves are in Iona, when you go there when you have to go talk to Yago, when you enter Iona, head forward and kill the enemies and go into the building on the left. If you don't an enemy is in there so one of your people will attack it. And the legs are gained by beating the new king and queen in Lenelle. With Jekar and Roailsand.

where do you start the king terin quest or something??

there are many walkthroughs for this game, i remembered they helped me alot
this is one for example
http://www.gamefaqs.com/console/ps2/file/250629/9992