The sun provides most of the energy for the wind (but not ocean currents) by heating up the ground and ocean underneath it. The air in contact with the ground heats up and rises, creating a low pressure area, which other air rushes in to fill (wind).

The sun has nothing to do with ocean currents. They exist because the Earth is rotating.

The sun provides almost all of the energy on Earth, so the heat from the sun causes most of the wind [air currents] when it hits different parts of the land and water and heats them differently. The hot air expands and pushes the cool air to make wind.

That's a short answer. UCSB's ScienceLine has an answer to the question about ocean currents and the sun: click here to read