Material to patch fill hole (L5L 5P5)

Just took out old toilet roll holder and a couple other things from my bathroom walls; I’m looking for materials like wire mesh, dry wall tape, mud to fill holes, and not sure what else I need to fill it. I have a piece of drywall and I have dry wall screws.

I’m in Mississauga Oakville border area near Costco.
Can you help with this request?
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