Here we go:

1. If a character w/stealth is on a hindering terrain, can a friendly character make a ranged attack going through that character?

2. If a character w/stealth is blocked by hindering terrain, and a friendly character is taken w/ mind control, can that character make a ranged attack at the character w/stealth?

3.
xxxo
xxxx
xcxb
xxxa

If a and b/c are opposing(b&c are on the same team),and a rolls to break away from b, can a get to o on the top right corner? Or does a have to stop in a square adjacent to c, because thats the 2nd opposing character hes come across?

Hope thats not too confusing, n sorry if these are stupid questions, im just a beginner. Thanks for the help!

No, you cannot attack through the character. In fact, outside of feats or other special circumstances such as elevated terrain, you may never make a ranged attack through another character regardless of Stealth.

Stealth blocks the line of fire from all characters, regardless of which team they're on. Although, as a side note, a Mind Controlled character becomes friendly to the side that MCed it and opposing to all other sides until it finishes its Mind Controlled action.

Assuming that the X's are the only spaces available to move into, you're right in your second question. Character A would have to stop because C is a new opposing character it moves adjacent to. The only exception would be if A was a flier. Fliers still have to break away but, other than that, they ignore opposing characters for movement purposes.

Welcome to the game, and don't worry about asking 'stupid questions' while you're still learning.

Thank you soooo much for replying so quickly!
So are you saying that if you are on the same elevation, you cant make a ranged attack through a friendly character?

Thanks again!

hi guys
well in most case you can't but there's a little exception : Giants !
from DRRules p.49 : "Standard-sized characters do not block line of fire to or from a giant character."

So even if a giant is "hiding" behind a friendly standard-sized character, the giant character can make a ranged combat attack "through" a friendly character (but the giant character can also be ranged attacked that way).

The two bolded lines below should help;
So essentially, your understanding is correct.

BoT