Help with some stuff on RPG Maker VX

Well first I want you to know I'm still a beginner with this. Okay, now with the questions.

1. When you make a new skill for whatever character how do you make a limit on how many times you can use it in one battle or to not be able to use it in one battle for however many turns.

2. Is there anyway to get another weather effect (like sandstorms, and yeah stuff like that)

3. How do you make an ally absorb a enemy's hit and then raise the attack and agility, and when it misses to absorb not have a raised attack and agility. Also to not have it keep absorbing every hit when you don't use the skill.(Note: If it's not obvious I mean all this happening on the enemy's turn. You used the skill to absorb on your turn.)

The answer to number one is already implented in the system but it will require a bit of setting up.
The last two problems will require a script.

Tell me how to set it up >.<, I found a tut for it before but I forgot where it was. Oh and crap I'm probably going to have trouble with putting whatever the script is into my first project im doing.