Faith means to belive that there is no god but Allah and that Muhammad is his slave and messenger.
Prayer means to pray 5 times a day.
The 5 prayers are:
Fajr- prayed before sunrise
Duher- prayed when your Shadow is short
Asr- prayed when your Shadow is long
Magrib-prayed after sunset
Isha-prayed after the sky is completely dark.
Charity is when you give money to the poor.
Fasting-You fast the month of Ramadan (A whole month). which means no eating or drinking from sunrise to sunset.(From Fajr until Magrib)
Hajj means pilgrimage. You walk around the Kaba 7 times.
Those are what the 5 pillars of Iman.