I would like to know balance equation of

NaHCO3 + Na4P2O7 + H2SO4 --> CO2 +??

First you need to know what are the products.

NaHCO_3 + Na_4P_2O_7 + H_2SO_4 \rightarrow CO_2 + ? + ?

The NaHCO3 reacts with the acid H2SO4. This is quite similar to the reaction of Na2CO3 with any acid. (metal carbonate + acid reaction)

As for the pyrophosphate, I don't know the reaction it might have with acids, so I can't give any help here.