Jesus went from one place to another by walking, so it is literally true that they did not walk where and when he walked, but the reader should also be able to understand that this metaphor indicates that they no longer wanted to hear what he had to say. (See: [[:en:ta:vol1:translate:figs-metaphor]])
Simon Peter gives this remark in the form of a question to emphasize that he desires to follow only Jesus. AT: "Lord, we could never follow anyone but you!" (See: [[rc://en/ta/man/translate/figs-rquestion]])
This is an ellipsis for "the twelve disciples," a specific group of twelve men who followed Jesus for his entire ministry. AT: "the twelve disciples" (See: [[rc://en/ta/man/translate/figs-ellipsis]])