Help me please

I need to know how to do these triggers. GUI is possible.
1. Every 3 seconds necromancer revives any dead ghouls around him.
2. Every 5 seconds a necromancer appears and does the same as above.
3. 50% chance Remove all gold from player 1 and when i kill a gnoll theif i get it back. after 5 minutes this is impossible.

Well for the first 1, just make a periodic trigger that goes off every 3 seconds, then make a unit group of all the necromancers (this is assuming you want every necromancer to do this) and have them cast your revival spell... but if you want to make the units that come back ghouls, whether the corpse was ghouls or not, then make the summoned unit a ghoul. Otherwise, I don't know a way to check that the raised unit was/is a ghoul.

For the second one, make another periodic trigger, 5 seconds, and make the trigger create a necromancer at wherever you want., If you want it to revive the ghouls instantly upon birth, just tell it to in the trigger. Otherwise, it'll be picked up after the next run of the first trigger.

Dunno about the 3rd off the top of my head.

I can give these to you if you need them, but if you can do them I'd rather not.

EDIT: I'm bored, so I made the first 2 triggers for you.
You can remove the last action in Trigger #2 if you don't want them to cast their revival spell upon birth.

You could raise only ghouls, but you'd have to trigger the entire revival spell.

AKA hell =p. He didn't specify, so what I gave should work fine unless he says otherwise.