Someone told me Buddha copied almost everything from Brahmanism, how accurate is that?

I am fairly new to the Dhamma and this site specifically. I was told by an Indian person that dyana (meditation) was a part of a yoga system which became zen in china, dharma became dhamma, most of Buddhists texts are sutras, ideas of reincarnation, maya (phenomenon), nirvana, samaddhi, sat (truth), chitta (conciousness), daya (compassion), ahinsa are all Hindu themes reinterpreted. How much did Sakyamuni reinterpreted on Brahmanism and how much is disinformed?