Of course, Hassidic Jews emphasize the fact that they raise their children as Hassidic Jews, but in reality, there is significant intergenerational flow, with some children of Hassidic Jews departing for other streams of Judaism, and with some children of Liberal Jews joining more Orthodox streams. This seems typically human. There is a similar intergenerational flow between Christian denominations.
It depends on which denomination within Judaism you are talking about. Non-Orthodox Jews generally follow the customs and social norms of the society they live in. Orthodox Jews vary. Strict, "ultra-orthodox" Jews have no dating at all. They generally rely on parents or other family to help find potential spouses. Modern Orthodox Jews may date, but it depends on the family and some families will require a chaperon.
Saturday is the Sabbath in Judaism. Orthodox (and some non-orthodox) Jews will not work. Many non-Orthodox Jews will work, but still remember the Sabbath day in their own ways. (And yes, there are some Orthodox Jews that work on Saturdays, but they do not advertise this fact).
In South Africa, like most countries aside from the USA and the UK, the Jewish communities are overwhelmingly Orthodox. Whether or not a person who attends an Orthodox Synagogue is Orthodox in his "non-synagogue activities" is purely up to the believer. So, some members of the Orthodox community may not actually be observant Jews and would appear like Reform Jews in the USA. However, they would not call themselves Orthodox, but Jews who happen to belong to an Orthodox synagogue. Actual Orthodox Jews in South Africa would be indistinguishable from Orthodox Jews in the USA.
It depends on how strict the synangogue is. Some ultra-orthodox Jews wear skirts that go all the way down to their ankles. But in most cases, if it covers your knees, you are fine.
Traditional Jews tend to be Orthodox, but some non-Orthodox Jews also hold tightly to traditional practices.
Most Orthodox and Ultra-orthodox Jewish men wear a kippah all the time. Married women in this group also cover their hair in public. Some non-orthdox Jews also wear a kippah all the time, particularly some rabbis and cantors.
The earlocks worn by some very Orthodox and most Hasidic Jews are called payot in Hebrew and payes in Yiddish. There are many variations in spelling.
Same Reason anybody else smokes.
Yes, ALL Orthodox synagogues do, but in the other synagogues, some non-Orthodox Jews will wear their own.
The laws dictating food production and consumption for Jews are called 'kashrut'.
The various sects are: Orthodox Mordern Orthodox Conservative Reform Liberal Reconstructionist