Did you try to restore a game prior to having gone to Toad Village or consider resetting adventures and starting over?
What about reseting the game to be a fresh start from the last time you left town?
Mekdawa should actually stop and talk to you if you haven't recieved the quest from him yet. The answer to "You need know what Ukabu mean?" is Yes.
Well, whatever you decide, not finishing Toad Village won't affect the rest of the game but I personally like to cover each area of the map. If you are at all the same, I can see how this situation has you so frustrated and I am sorry you have to experience it! The game is really fun and TOad Village was one of the biggest challenges in the earliest stages of the game.
Moni