Answer:
Hi! Here's a little answer:
1) Yes! I do believe that the Ten Commandments changed how they lived. It helped provide some (rough) guidelines for how they were to live their lives. Before, rules were there, but none of them were set in stone (literally)
2) I think that the Hebrews didn't really always follow the Commandments that God set before them. They still killed people, got with others' wives, made idols, etc... but one that I think was extra important was the 8th, stealing. Stealing was punishable by death back then.
3) One Commandment that not many people care about anymore is the 7th, "Thou shalt not commit adultery." Women are constantly getting pregnant out of wedlock, and are taking contraceptives to help justify their actions.
Explanation:
Hope this helps!