1999 Chevy Malibu LEAKING ANTIFREEZE - APPEARS TO BE BELOW

WHAT IS TYPICAL COST TO REPLACE WATER PUMP ON 3100V6? mY RESEARCH SHOWS THAT THE PUMP AND TIMING COVER IS OF THE SAME PART/PIECE, IS THIS CORRECT? SHOULD I HAVE THE TIMING BELT REPLACED? GASKETS? IS THERE ANY THING ELSE THAT CAN BE CHECKED/REPLACED DURING THIS PROCEDURE? I ATTEMPTED TO TAKE THE PUMP OFF BUT DIDNT GET FAR AFTER FINDING A PHOTO OF THE TIMING COVER/PUMP. i HAVE ALSO HEARD OF THE INTAKE MANIFOLD LEAKING COOLANT, IF THIS IS THE CASE WHAT IS A REASONABLE ESIMATE FOR REPAIR?

THANKS
PSORE