What follows are some "items" that are Essential to Buddhism .
After Gautama got Enlightenment he had 4 Realizations that became better known as "The Four Noble Truths" . They are : All Existence entails Suffering ; Suffering is caused by DESIRE ; There is an End to Suffering ; To End suffering one should follow the 8-Fold Path .
The 8-Fold Noble Path is
Right Views
Right Thoughts
Right Speech
Right Karma
Right Life
Right Practice
Right Mindfulness
Right Meditation .
The 10 SUPER-POWERS of a Bodhisattva
Devotion to the Buddha's Teaching , and no attachment to anything
The Super-Power to increase that Devotion
The intrinsic ability to instruct all Beings and alter their conduct .
Knowing what people think.
Giving people what they want
Unrelenting Exertion
Employing all vehicles but never abandoning the Mahayana
The mysterious aptitude to see the Buddha in every cell and on every World
Making people turn toward the Buddha's Teaching and Guiding then to Perfection
Satisfying all people with even a single phrase