If I have Tajuru Preserver and my opponent has Kataki, War's Wage and I have mana enought to pay for my artifacts can I choose notno pay and not sacrifice?
No. The ability causing you to sacrifice your artifacts is one that your creature has so you control the trigger. Tajuru Preserver will not prevent the sacrifice in this case. You either pay the mana or you sacrifice.
There are no cards with an effect that causes triggered abilities that you control to be unable to cause you to sacrifice permanents. The closest thing there is is the effect on Assault Suit, which if equipped to an artifact creature will make it impossible to sacrifice that one creature (though you would also have to pay to not have to sacrifice Assault Suit itself.)
EDH: RWB Edgar Markov The current updated decklist is here
EDH: WUB Oloro, Ageless ascetic The current updated decklist is here
EDH: UWG Phelddagrif, The current updated decklist is here
EDH: WUB Yennett, Cryptic Sovereign The current updated decklist is here
EDH: WUB Alela, Artful provocateur The current updated decklist is here
EDH: GB Hapatra, vizier of poisons The current updated decklist is here
EDH: RWB Edgar Markov The current updated decklist is here
EDH: WUB Oloro, Ageless ascetic The current updated decklist is here
EDH: UWG Phelddagrif, The current updated decklist is here
EDH: WUB Yennett, Cryptic Sovereign The current updated decklist is here
EDH: WUB Alela, Artful provocateur The current updated decklist is here
EDH: GB Hapatra, vizier of poisons The current updated decklist is here
Locking this thread to make sure it doesn't go further into strategy.
-MadMage