Orthodox Jews don't, but Jews who belong to other branches of Judaism may or may not eat non-kosher foods, it's a personal decision.
Foods that Jewish people cannot eat are known as 'non-kosher'.
They eat the same foods as everyone else.
Meat and dairy
The same foods everyone else ate.
Kosher foods.
That depends on what country they're from and where they live. Religiously observant Jews will only eat kosher food.
They eat kosher versions of Russian foods.
When God told them to in Leviticus 11.
Orthodox Jewish teenagers eat the same things all Orthodox Jews eat; kosher foods of all different kinds.
Because the Torah has a section detailing what foods are and are not suitable for eating. Jews follow these rules as part of our path to living a righteous life.
They ate the same foods as everyone else.
Depends of your Jewish or not