The baptismal font contains the water that is used to baptise people. This is where new life as a Christian begins. Statues in churches help us think of the saints. The faithful can ask the saints (not the statues!) to join them in praying to God. These saints are all close to God in heaven.
When you light a candle at one of the statues, this candle represents your prayers that continue even when you leave the church. The saint will pray for you.