Tradition holds that there are 613 guidelines by which Jews are to live, the Hebrew word for these guidelines is 'mitzvah' (singular) | 'mitzvot' (plural).
Religiously observant Jews will not eat any food that is not kosher. The basis of kashrut is the Torah, this is a part of the guidelines for living righteously given to the Jews by HaShem.
Kosher means 'fit or proper'. Kosher food refers to food that has been prepared following the laws of kashrut. The basis for the laws of kashrut is the Torah which provides the general outlines of what is and isn't fit by Jews. The goal of these guidelines, as is the goal of all the guidelines found in the Torah, is to provide Jews a guide to living a righteous and good life. These guidelines apply only to Jews though as there are different paths for different people.
The mitzvot (plural of mitzvah) form the core guidelines for how Jews are expected to live.
Kosher means "fit" or "proper". Kosher food refers to food that has been prepared following the laws of kashrut. The basis for the laws of kashrut is the Torah which provides the general outlines of what is and isn't fit for Jews. The goal of these guidelines, as is the goal of all the guidelines found in the Torah, is to provide Jews a guide to living a righteous and good life.
The Torah isn't a symbolic item. It it is the backbone of Judaism, providing the core guidelines for how Jews are supposed to live.
It depends on who "us" is. More likely than not, the answer is "yes", if only because non-Jews often eat pork or shellfish and mix meat and dairy in contravention of Jewish guidelines.
The Torah is important to all Jews as it is the foundation of Judaism and contains the core guidelines that teach us how to live righteously.
For the same reason that they wrote the mishna. People were forgetting the oral tradition so it had to be written down, now with more detail than the mishna. Also some Jews were living in Babylonia and some in Israel, the Jews in Babylonia would be teaching differently than the Jews in Israel. Therefore, they wrote the Gemara so that all Jews would have the same "guidelines"
The 613 mitzvot (guidelines) found in the Torah form the basis for Jewish law. Jewish law itself is called 'halacha'. Halacha is found in the Talmud.
Jews do not eat pork, and they do not eat meat and dairy in the same meal. There are also guidelines for specific holidays, like no yeast on Passover and fasting on Yom Kippur.
Yes, Jews can eat couscous, but whether they do so depends on dietary laws and personal preferences. For those who observe kosher dietary guidelines, couscous must be certified kosher and prepared in a way that adheres to these laws. Additionally, during Passover, some Jews may avoid couscous altogether, as it is made from wheat, which is considered chametz.