He did not sell paint. He sold one oil painting in his life-time.
The usual kind of oil paint.
sunflowers
Oil paint on canvas.
Vincent Van Gogh
Oil paint and brushes.
No, he did not.
Usually oil paint on canvas.
Things around him: people, landscapes, rooms, ...
864 paintings by van Gogh are known.
using a paint brush
The Starry Night is an oil-on-canvas painting by Vincent van Gogh.
Van Gogh started to paint only after he felt he mastered the technique of drawing. This was in The Hague period. Van Gogh made a few (bad) sketches when in England.