iOS to Android Music Questions

I'm making the long overdue switch to Android from Apple and have several questions regarding music.

I'm getting either a Note 7 or S7 Edge and understand that Samsung has a great utility to transfer music - correct ?

For ringtones I saw something about moving them over to the new phone and renaming them to *.mp4a - is that correct ?

What is the best app to play music ?

What is the best place to buy and download music ?

Thank you !

from Android Authority Forums http://ift.tt/2aX1ha3
via IFTTT