Scenario 1: "I'm renting out a room" Scenario 2: "I'm renting a room" 3 - "How much are you willing to pay?"

Not exactly. - perpsonal should be spelled "personal" - it would sound more natural to put "a" in front of "personal message" - use "had asked" instead of "have asked" In total - It would be better if you had asked this question with a personal message.

Your interpretation seems correct :)

"Take up" here somewhat means to adopt or make your own, so "take up the call" means the tower guards are going to adopt and repeatedly shout out Boromir's call "The Lords of Gondor have returned" when the time comes. It also implies that they are calling out for some good reason. The definition you thought of is used more like you're adopting an action or hobby; for example, "I've taken up knitting" means you've begun to make knitting your hobby.

Yes, mostly! All of them except "We have some common hobbies" sound right. You could also say "We share some hobbies", with "common" being implied here because you're sharing the hobbies already.

It's much more common to omit the "doing" than omit the "are", so you would hear "How are you" the most, followed by "How're you doing" and "How are you doing".

1st: there should not be a comma in "don't trust anyone but your family." 2nd: yes, they're very similar. The only difference would be that sentence 1 assumes that the person already seems good to the person you are talking to, while sentence 2 could also be saying that whether they are bad or good when you meet them in the future, don't trust them. So if you haven't met the suspicious person yet, you couldn't use sentence 1. If you've already met the person and they do not seem good, you cannot use sentence 1 nor 2. If you've already met the person and they seem good, you can use either 1 or 2.