That is a lie. There were hardly any ethnic Africans in South Africa before it was even a nation. White settlers created farms and later industry which brought immigrants from other parts of the continent for work. No farms were taken from blacks and given to whites.
Almost exactly true. There was a small population of nomads in the Cape. There was a decent (low 10s of thousands) population of Zulus in Natal. The rest of the country was extremely sparsely populated. The Bantu came down from the north because there was work on the farms, housing, education, and because it was a lot better life than them and their ancestors had had for tens of thousands of years.