The notes for Fur Elise are exactly what is shown in the music.
1 fur elise
fur elise
fur elise
The sheet music can be found at IMSLP.org.
Music for it can be found at IMSLP.org.
The sheet music for it can be found at IMLSP.org.
No. Fur Elise was composed as a Bagatelle, not a song. A Bagatelle was a short piece of music usually composed for the piano, and it did not include a vocal part.
One would likely be able to find the music for Fur Elise at their local music store, as it is very popular. You may also check online sheet music sites for the work.
Yes. The piece is in the key of A minor.
Get a recording or buy the sheet music and play it.
Sheet music for this piece is available at IMSLP.org.