Buddhist core values are summarized by three basic teachings.
The first being categorized as The 3 Universal Truths:
"Nothing is lost in the universe"
"Everything Changes"
"The Law of Cause and Effect"
The second being practices that include:
Sila - having similar ideas of the Christian "Golden Rule"
Samadhi - working on the mental development
Prajna - regarded as the heart of Buddhism, as to maintain the mind pure and calm in order to reach Nirvana.
And the final known as The 4 Noble Truths, those being:
Dukkha - Suffering exists
Samudaya - There is a cause to suffering.
Nirodha - There is an end to suffering.
Magga - In order to end suffering, one must follow the Eightfold Path.