I plan to replace my Ignition coils and modules, how many will I need to buy?

there are 4 ignition coils,2 wires per coil. there is also one ignition control module that the coils sit on top of.the A/C Delco coils times 8 are around $75.00 each.. the A/C Delco ignition control module(only one of these) is around #315.00...if you need spark plug wires also.then the set is around $175.00 for the A/C Delco wire set...IF YOU NEED PLUGS ALSO,THEN THE A/C DELCO PLUGS ARE AROUND $7.00 EACH TIMES 8.......................