Microsoft Points were retired in 2013 (replaced by local currency). Minecraft: Xbox 360 Edition launched in 2012 for 1600 Microsoft Points ($20).
The Xbox 360 Edition no longer receives updates (final: TU73, 2018) and is delisted from the marketplace. It cannot be purchased digitally.
To play Minecraft on Xbox today, buy Minecraft (Bedrock) on Xbox One/Series X|S ($19.99) or via Xbox Game Pass. Worlds do not transfer from 360 Edition to Bedrock.