using a paint brush
He wanted to get the colours of his landscape in reach.
He thought it would be a nice picture.
Vincent Van Gogh
As van Gogh died in 1890 any picture of Bart Simpson signed by van Gogh is highly suspect.
Oil paint and brushes.
No, he did not.
864 paintings by van Gogh are known.
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.
In 1881.
He paint for his life
Van Gogh used oil pastels I believe.