The speaker is still addressing the proud, hoity-toity readers—the ones that, he imagines, might have mocked the lowly farmers in the churchyard back in stanza 7.
He asks them whether a fancy-schmancy urn (a container to hold a dead person's remains) or a really life-like bust (a statue of a person's head and shoulders, in this case to commemorate a dead person) could call the breath back to a dead person and make him breathe again.
Except he doesn't say so quite that directly—he uses a metaphor. The dead person's body is a "mansion," and the speaker personifies the urn and the bust, asking if they can call the dead person's breath back to the mansion of their body. Phew, that's a mouthful!
Second rhetorical question: the speaker asks if the voice of "Honour" (another personification!) can provoke the silent, dusty remains of a dead person to speak again, or whether Flattery (another personification!) can make the cold ear of Death (yet another personification!) feel better about being dead.
(The answer to both of those rhetorical questions, obviously, is "No, of course not!")