What is the least cost approach to run these suckers into the ground?

Outside Filter Whos $$$ ?

Haynes 3 Qt Drain ?


Drain and FILL with 4 people and hoses Tanks Etc?

THANKS

1999 GREEN Contour SE SPORT Duratec V6, ATX, SUNROOF, 93,000 Miles, P0420 ON&OFF -replaced DS O2 --did not FIX *New TORQUE CONVERTER @ 53,000-Intermittent P1744 *New DASH at 53,000 and New DASH lifted-now using MOLLEY bolts to pull down