i sank it in a lake and sucked water up what oil and spark plugs do i need?

Oil and spark plugs for the rollback bringing it to the salvage yard. UNLESS , your definition of 'sank' means you got the tires wet and then it rained , like , really heavy. ..............Did the inside of the car get wet?

Call your insurance co to see if they will give you anything for it! If it sank, buy oil and plugs for your next car!