Here "coming" stands for the enthusiastic welcome experienced by Paul and his companions. Alternate translation: "how warmly you welcomed us" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "turned to ... from" is a metaphor that means to start being loyal to one person and stop being loyal to someone else. Alternate translation: "They tell how you stopped worshiping idols and started serving the living and true God" (See: [[rc://en/ta/man/translate/figs-metaphor]])