This First Cause causes all elements in this series but which itself is not caused by anything prior in time. God is a self-caused cause. Everything is caused. Every sensible thing is caused. Every material thing is caused.
Every contingent thing is caused.
Every event is caused. They did not get started, but they do exist because they always have existed. This premise assumes that a first cause at the beginning of one causal chain is the very same entity as a first cause at the beginning of some other causal chain. That is, it assumes that there is exactly one first cause. There is no reason to grant this assumption.