Sorry if I confused you last time. Family is a collective noun, but people is not- it is the plural of person. DO the people travel a lot? People ARE strange (all people), or a specific group THOSE people are strange.

Rather than saying "It's okay?" you should say "Is that right?" or "Is that correct?". "Is this okay?" would also work. The reason "It's ok?" doesn't work, is because "It's" is a contraction for "it is" or "it has". It's hard to give you a straight answer, but I can tell you which of your sentences were correct, and maybe give some helpful examples. "Does the family travel often?" is correct. "Do the people travel often?" is correct, but it doesn't make sense, because "people" or "the people" basically means "humans", so this sounds like a question an animal would ask. "People are strange." is correct. "Is there any people?" is incorrect, instead you could write "Are there any people"...but this is still incomplete. When you say people, you should put something after it that tells us WHICH people you are talking about. Here are some examples: "Are there still people over there?" "American people are strange." "Do those people travel often?" Notice how I use "those" or "over there". When you see these things, imagine pointing to a group of people standing together. If you say "people" by itself, it's more like you are pointing to everyone on earth.