Peers has two meanings:
1) verb: to look or gaze. For example: He peers at the puppy through the window. (that is, he looks at the puppy through the window)
2) noun: Individuals who are comparable on some given metric. For example: My peers and I met to discuss issues which impacted our lives.
Peer's refers to something belonging to a single peer (definition two above).
For example: I thought that my peer's sweater looked very nice on him.
Peers' refers to something belonging to a group of peers (definition two above). For example: As a group, my peers' achievements are very impressive!
So for your sentence on taking advice, I would assume that you would want
to use "peer's", because it refers to the advice which comes from a single peer.
The story is told from the view point of the story's protagonist, Thomas.
He could not find a hint; He could not find a sign; He could not find a trail; He could not find a clue.
You can write a draft of ideas you have for an essay, making sure that all ideas are presented, and you can make a chart of how you want something to be presented, i.e. what will be in the introduction, what will be in the body and what will be in the conclusion. You can also plan out how you want the reader to see it. Sometimes in films they show something happening and then say "48 hours earlier" or something. It gives the reader an idea that you actually thought about how you want the story to be told. When you organize writing it's always important to have an open mind about what you're talking about. You can't have a narrow topic that you can't talk a lot about, you need ideas first.