What was Yisro referring to when he said "Vehizharta es'hem es Chukim ve'es ha'Toros?
Ramban: He issuing them a strict warning about keeping the Mitzvos and about the punishments that are due for not keeping them.
What was yisro referring to when he said "ve'Hoda'ata Lahem es ha'Derech Yeilchu bah, ve'es ha'Ma'aseh asher Ya'asun"?
Targum Yonasan: "ve'Hoda'ata La'hem "- refers to Davening in Shul; "es ha'Derech - to visit the sick; "Yeilchu bah" - to bury the dead and to perform Chesed; "ve'es ha'Ma'aseh" - to carry out Din; "asher Ya'asun" - to go Lifnim mi'Shuras ha'Din" with the Resha'im.
Bava Kama, 99a: "ve'Hoda'ata La'hem" as 'Zeh Beis Chayeihem'; 1 "es ha'Derech" - 'Zeh Gemilus Chasadim'; "Yeilchu" - Zeh Bikur Cholim'; "bah" - 'Zu Kevurah'; "ve'es ha'Ma'aseh" and "asher Ya'asun" - See answer #1.
Mo'ed Katan, 8a: "es ha'Derech Yeilchu bah" teaches us that marking graves 2 is a Torah obligation. 3
Kidushin, 2b: Grammatically speaking, "Yeilchu bah" teaches us that "Derech" is sometimes feminine. 4
