What items can be farmed fully automatically?
Is there any way to go from wood blocks to items without manual intervention?
I'd like to mine wood automatically without having to use my hands/tools.
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Currently, the only way to get from a wood block to a wood item without manually breaking it is to fuse TNT close enough to the wood block. Unfortunately, TNT will also do the same to any block within a certain radius and there is a ~70% chance that no item will drop from the destroyed block.
There is no way to do this. You cannot automatically mine solid blocks (apart from sand and gravel) in the vanilla game. While methods exist for automatically mining stone, there are no resources as output.
You can use TNT, but it's infeasible to do so in any kind of automated fashion, and you lose most of your blocks. You can use fire charges to destroy the blocks, but you'll get no wood in return.