Buddhism is a philosophy of life preached by Gautama Buddha ("Buddha" means "enlightened one"), who lived and taught in northern India in the 6th Century B.C. The Buddha was not a god and the philosophy of Buddhism does not entail any theistic world-view until after it was introduced into China. Renowned Chinese gods in Buddhism like Guanyin (Bodhisattva Avalokitesvara) and Milefo (Maitreya) were actually humans who came to China to preach.
Christian faith is the relationship with God, the Creator of all things. A person is accepted by God, not because of his deeds but because of who he is, a chosen child of God. (This concept is very similar to the fact you are a member of your earthly family regardless what you have done. Without this relationship, you are like a run-away child). Although we are all sinners, God still loves us and sent his Son Jesus Christ to die for our sins on the cross.
The religion of Islam is built upon the five pillars that define the essential elements of Islam. Once you become a Muslim you should implement all these in your daily life. The pillars are:
1)Testimony of Faith - Shahada
Witness to two individuals that
a)There is no god except Allah
b)Muhammad is the messenger of Allah.
2)Five daily worships - Salaat
3)Fasting in the month of Ramadan- Sawm
4)Donation to charity - Zakat
5)Pilgrimage to Mecca once in your life Hajj
Constrast:
The existence of a personal creator and Lord is denied by Buddhism. However, Christianity believes in a personal creator and each may have a relationship with the creator, Jesus.
Some in Buddhism deify the Buddha and worship other gods as well. Christianity is clear that a personal God exists but He