ok i have a question about this card.i know thats Toons requires Toon World on the field but is this card different?do you need Toon World on the field to summon this monster and if not would this monster still get it discarding effect?

This should help(somewhat):

Toon Gemini Elf
Earth
Spellcaster/Toon
4/1900/900
Effect:This card cannot attack during the turn that it is Normal Summoned, Flip Summoned, or Special Summoned. When "Toon World" on the field is destroyed, this card is also destroyed. If "Toon World" is on your side of the field and your opponent does not control a Toon Monster, this card can attack your opponent's Life Points directly. When this card inflicts Battle Damage to your opponent's Life Points, your opponent discards 1 card randomly from his/her hand.

To summon the card, you DO NOT need toon world.
To attack directly, you DO NEED toon world.