you can all roll nature to see if you know anything about this "Klarg."
and yes, from where you are you see a total of 4 creatures.....

(Nature: 3)

Wolfe nature: 18

(Rabbit Nature: 13)

Nature :9

Krull says "that Klarg must be strong leader.. a worthy challenge i like it!" 

Rabbit and Wolfe, you know this creature as a bugbear

"I think we're dealing with a bugbear folks, sneaky bastards but that won't help him when he is cornered." Wolfe says, still waiting for either Mau to snipe the sentry or Edryd to move in with his shield.

(Oops didn’t realise you were waiting on me)

Mau takes to a knee aiming his short bow at the first goblin sentry taking careful aim before releasing the arrow.

(Attack: 7 Damage: 4

If I get advantage for surprise 7and sneak attack damage3)

"Well it was worth a shot Mau, time to move." Wolfe whispers quickly and motions for Edryd to move forward, trying to take a shot of his own when possible.

(Edited as everyone else posted while making my original.)

Rabbit nods in agreement with Ludolf's comment about Klarg. She just starts to ask when we were going to get moving when Mau fires off a shot. 

(Not sure of timing, but Rabbit would make a quick spell attack as well once she realizes Mau is attacking.  I presumes she fairly near to the back of the group.)

As Edryd sees the arrow fly past his head toward the goblin he raises his shield and rushes in toward the foul creature! He harbors no further desire to treat with these evil beings corrupting his precious darkness.

Krull as sees the others lunching an attack he follows 

Initiatives - will resolve attacks soon

Mau - 18  
Wolfe - 12. 
Rabbit - 12. 
Edryd - 13. 
Krull - advantage from Edryd 19. 
Ga - 4. 
Gb - 8. 

Klarg - 20. 
Goblin 1 -  20
Goblin 2 - 12. 
Ripper -  5  

Initiative order:

1.  Klarg, Goblin 1
2.  Krull, Mau
3.  Edryd, Wolfe, Rabbit, Goblin 2
4.  Gb, Ripper, Ga

[The goblin is not surprised, so you won't get any quick spells off.  But in the future, that is something you can try if you plan for it, definitely].

G1 hears the tell-tale sound of a bowstring being drawn back and yells something in Goblin!  It looses its arrow at Edryd before backing up into the cave, trying to hide out of sight.  Attack: 23 Damage: 5     stealth - 25.  

Klarg - an ear-splitting roar assails you off the walls.  "Intruders!  Klarg hate intruders!  Klarg will feed you to his pet and make a throne out of your bones!"  You watch as Klarg disappears out of your view.  (Readied action).

Mau, your attack goes wide of G1 and clatters off the rocks.  

Krull is up!

MAP

(Will he be able to move in front of Edryd? It looks like we are packed in one place all together as the passage is quite narrow..if yes he ll move in front of Edryd and ll throw a javelin at the goblin that assaulted them Attack: 18 Damage: 6

If no he ll hold his action and  throw his javelin once he finds an opening)

You can move in front. The goblin that shot the arrow is nowhere to be seen but the other is visible. Do you want to attack that one?  You’ll have to move a bit further and south.  

(Yeap it's fine then I ll do that)

As combat erupts Wolfe moves forward enough to catch sight of the closest goblin, touching his talisman with one hand, making a quick gesture with the other while uttering a beautiful syllable he swiftly hexes the goblin (Hex, dex). Then, with another gesture of his hand he sends a beam of radiant crackling eldritch force streaking towards it.

Eldritch blast: 18 Force: 9 Necrotic: 1

He then retreats to wherever possible.

Do you want to be out of sight or in the fray?  Behind someone?  ........  You can move through others’ squares just not attack from them.