Many people break their fast on honey cake which is traditionally eaten on Rosh Hashana and during the high holy days. There are no specific foods that are eaten after the fast, you can eat anything you like.
Orthodox Jews are only allowed to eat kosher foods.
Orthodox Jewish teenagers eat the same things all Orthodox Jews eat; kosher foods of all different kinds.
It depends on the level of observance. Orthodox Jews eat nothing BUT kosher foods.
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.
bagels and lox, and cholent - though not together! Correction: Although bagels and lox and cholent are specific items that Orthodox Jews might eat (assuming they're kosher), that would make for a rather boring and not too nutritious diet. Orthodox Jews can eat anything that is kosher.
Orthodox Jews keep meat and dairy separate at all times.
Practicing Jews will only eat kosher foods.
So Orthodox Jews can eat it.
Orthodox Jews, as well as other Jews, are able to do whatever they want to do. Those Jews ... Orthodox, Conservative, Reform, or any others ... who decide to observe and adhere to the formal standards and teachings of Judaism do not eat pork. In that respect, they are mirrored by Muslims and Hindus. Orthodox Jews, though, are more likely to observe and adhere to that standard than Liberal Jews (like Conservative, Reform, and Secular Jews).
No. That applies mainly to Orthodox and Conservative Jews.
Muslims and Jews don't eat pork. Muslims eat shellfish, but Jews don't.
Religiously observant Jews will only eat foods that are kosher.