what is the average cost for replacement 2004 Toyota corolla
Original equipment Denso spark plugs @ rockauto.com cost about $6.50 each. You need four spark plugs. They are easy to replace. A trusted private mechanic would do the job for less than 70 pounds.
Call a Toyota dealer and ask what they would charge using the spark plugs you purchased.
Depends where you go, a dealer will be over
