I think you're referring to the Four Noble Truths:
the eightfold path is the path that Buddha taught.
buddha first taught at varanasi
Nobody taught the Buddha. He came to his own conclusions.
Buddha taught the path leading to the end of suffering.
the buddha taught it for his next 45 years.
No, the Vedas are ancient sacred texts in Hinduism, while the Buddha was the founder of Buddhism. The teachings and beliefs found in the Vedas are different from those taught by the Buddha.
Nobles women taught their children mannors and culture.
Buddha taught everybody how to practice
The three religious belief systems are buddhism, confucianism, and neo-confucianism. They are taught by Buddha and Confucius.
No one. They were not educated. Only the nobles.
I'm not sure what you mean by 'save', but buddha taught Buddhism to many people and how to meditate, become enlightened etc.
Buddha taught the Eightfold Path so that people could stop being reincarnated into more suffering.