New car or can oil leak be fix?

I have an 04 Honda civic and it started off on a Sunday when i took the ignition coils out (while the car is on) one by one to make sure they work, then the next morning i turn the car on. When the car finally settled that s when the engine starts rumbling like its losing power and the engine light came on. I drove to work and came back home at the end of the shift, checked my car and opened the coils. Out of the 4 coils, 2 have oils in it. I was thinking about changing the spark plugs, valve cover gasket, and cleaning the oil in the spark plug well. Will my car be fine after all that change or do i need to buy a new car?

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