Call somebody else cause the oil light reset got nothing to do with a P0301 code!!!... Don't guess at this misfire code... Have it tested to find out what is wrong before installing any parts... Anything less is simply guessing!!!!!!
RepairPal Certified shops can diagnose and repair your 2008 Toyota Camry. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Replace the plugs as there is high resistance and burning through of the porcelain to ground in the plug hole. I would assume he put out the CEL (Check engine light) not the maintenance light. If he didn't do anything besides that it will come back on.