Normally three odes would be chosen and chanted in their entirety. This does not normally mean, however, making up the 14 troparia (verses), if these do not already exist. Thus, if there are only 6 troparia in the first ode of Orthros, those six will be chanted, and then we move on to the third ode, etc.
The odes of the canons are normally always chanted. It would be rare to hear them spoken; perhaps if the cantor or deacons were ill?
The Divine Liturgy begins immediately after the Great Doxology.
If all the odes were to be chanted, it is possible that they chant them in the Greek style, which would mean hirmoi and katavasia only.