Conjugated words ending in -ed and -ad are the imperative form of verbs of you in the vosotros form:
This is used only in Spain, in the Castilian dialect but it can be understood in all the Spanish speaking world. There are lots of books translated in Spain, and these translations go to many countries(at least in Mexico most translations come from Spain).
The translation will be:
Tened esto - take this[you] (Imperative for two or more people).
Coged esto- hold this[you] (Imperative for two or more people).
Cantad esta canción - sing this song[you] (Imperative for two or more people).