I have no sound on my computer so cant help but have you tried Shazamming it Call 2580 on your mobile, hold it to the music until the call ends itself. After about 5 seconds you will receive a msg saying the artist and title of the song. Costs 50p plus standard msg charge.
1. This is indeed Enya. It's the start of a medley track called Triad: St. Patrick/Cu Chulainn/Oisin from her album The Celts..
2. Adiemus, from Adiemus: Songs of Sanctuary composed by Karl Jenkins, lead vocals by Miriam Stockley.
3. Circle Of Life from the stage show of The Lion King, presumably the Broadway cast. It has a long intro starting at about 2:46 but is all the same track.