Moved this to Question and Inquiries
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Have you visited our wiki yet?
For
production skills, have a read about them here:
http://www.fiestafan.com/wiki/Production_Skills
You have to learn the production skill first (whether you want to make enhancement stones, buff scrolls, potions, material composition or decomposition) before you can make anything. Keep in mind you can only learn 2 per character. People usually have more than once character so you can learn all of the production skills (just on different chars).
After you learn it, you have also buy the "recipe" (aka skill) for the thing you want to make. For example, if you want to make Elrue [1], you have to buy the skill/recipe for this. You can get all the skills from Skill Master Ruby in Roumen or any Skill Master in Elderine. You have to click the Alchemy tab (third box) to look for production skill recipes. You can also click the arrow on the bottom right corner for more skills if you haven't noticed yet. After you learn the skills, you must have the "ingredients" you need for the Elrue 1. You can find out what you need by looking at your alchemy skills box. You find this box by pressing K also.
Then walah, you can specify how many stones you want to make in the skills box and you will start making them.
For
enhancing weapons, you can read all about them here:
http://www.fiestafan.com/wiki/Enhancement_Guide
Buffs
Buffs are casted by clerics that enhances your character stats. At lower levels, clerics can cast party buffs that increases your defense/damage. At higher level (level 47), clerics can cast a buff that increases your HP/SP by about 400-500 (I forgot the exact value). Scrolls can also act as buffs too, as you can get scrolls that increases your aim, defense, magical defense, critical rate, etc. But usually when people talk about buffs, they refer to the ones clerics buff, and not scrolls.
Hope that answers some of your questions. xD