You are in the correct place, outside Poseidon, to catch the Baht Bus to Pattaya. Get one going right to left...on the nearest side of the road.

For Sunee...About 400 metres after the bus passes the overpass (there is only one) look out for the VC Hotel on a street corner on the right hand side. Push the bell, get off and walk back to the VC Hotel. Go up that street which is Soi 17 until you reach Sunee Plaza on the right. About 300 metres.

For BT
Stay on the bus after it passes the VC Hotel and arrives at a major cross roads with traffic lights. There is only one.
AFTER the bus has passed the cross roads push the bell and get off. You will be outside BT, give or take a few metres.

School
To get a bus back to Jomtien turn right out of BT and walk back to the previously mentioned cross road with the traffic lights. The School is directly in front across the road and you will see the buses straight ahead. DO NOT turn left, those buses are going in a different direction.