Good news, Amy; your Corolla has an engine with a timing chain rather than a timing belt. While a timing belt needs periodic replacement, the timing chain should be good for the life of the engine.
Like most current model Toyotas it has a timing chain. Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice.
I own a 2008 Toyota Corolla Conquest Sedan with 90,000kms. During my last service my mechanic had told me that at about 91,000kms I will need to be replacing the timing belt and it's going to cost me ...