I took a taxi to la Boca and back
Depends where you are staying. We stayed in a hotel on Carlos Pellegrino so we were right near the main busway. Buses were simple just need to get a card from a kiosk and top up for travel which was very inexpensive (about 50 cents AUD per trip). Each bus station shows the bus routes for the numerous buses only need to remember the route number and it will bring you back to your starting point. A lot of Argentinians speak English and we found everyone helpful.
The Hop on hop off bus was a great way to make a visit to La Boca
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