Recently, a customer wrote asking what items might be best for a basic start in oil painting. Of course it is a "huge" question because there are so many possibilities and levels. You could spend a small amount, or a large amount. Many ways to go.
However, here are a few possibilities........
1) To start out with, a way of sketching your rough ideas for paintings...
2) You then need a small number of basic colours...
https://www.arttreehouse.com/store/content/burnt-umber-artist-colour (can be used alone for canvas sketches)
https://www.arttreehouse.com/store/content/treehouse-white-artist-colour (your fundamental white for all purposes)
https://www.arttreehouse.com/store/content/burnt-sienna-artist-colour (basic earth red)
https://www.arttreehouse.com/store/content/phthalo-blue-artist-oil-colour (great all purpose blue)
https://www.arttreehouse.com/store/content/hansa-yellow-artist-colour (useful bright yellow)
https://www.arttreehouse.com/store/content/yellow-ochre-artist-colour (historic essential color)
https://www.arttreehouse.com/store/content/red-254-artist-colour (stunning bright red, often used as a highlight)
3) A round brush and a shader...
https://www.arttreehouse.com/store/catalog/brushes-0 (probably start out with larger brushes, maybe size 8 or 10)
***These are short handle brushes. Long handle brushes are more useful when you wish to paint with a "long arm" to see how your perspective is doing.
4) A thinner for both working with the paints and cleaning up the brushes...
You can probably find very inexpensive stretched canvas at a local store. I once bought a package of two (20 inch) for $19.95 at Ben Franklin's.
The above list is a basic start for a small amount of money. There are many ways to go from here - all important and exciting. Of course, that's what oil painting is about :-)