"sword," and "pen" demonstrate metonymy, refering to the church, the military, and the literary arts, respectively. In Wordsworth's sonnet, he accomplishes two purposes and develops two themes. He pays personal tribute to John Milton, and he offers strong social criticism of conditions in England in 1802.
If you mean 'starting with five dollars' then it is a gerund phrase
The correct answer would be the fourth option: My Uncle Bill has such a beautiful voice; many couples have asked him to sing at their wedding.