Beginner's Questions

[EaTCarbS]

Welcome to Dual-Boxing! I will address your questions to the best of my ability.
(Inb4 Ualaa comes with an epic reply)

Gathering quests: I've met my first one in the goblin starting area (collecting crates), it seems like pain the bum to have to individually collect on each toon. Are these kind of quests avoidable in the future ; are there any addons to streamline to levelling process, so you can avoid them?

With how Blizzard is setting up quests, it is pretty hard to avoid gathering quests without leaving yourself high and dry without quests to do. I know that you can get through Outland and possibly Northrend without doing gathering quests, but for the rest you may have to just tough them out.

My second issue, it I'd like my SLAVES to cast for example LIGHTNING BOLT at the SAME TARGET as my MASTER is attacking. I've tried using various options in the FTL keymap sections on the out of game Inner Space software menu, but so far to no avail. I've previously made assist macro's in-game but I believe with this program it isn't neccessary.

I prefer to do all of that stuff in game rather than rely on the software to do it for me. I personally use a focus based setup to achieve my goals. My macros look something like:

/cast [target=focustarget] Lightning Bolt

You will need to set whichever toon you are leading with as your focus for this to work.

When handing in quests or picking them up, I usually have to press the combination off Shift+ctrl+delete, to broadcast
too all my toons then watch the cursor hover over the NPC and then click, problem is my camera angle is different on each toon and it means I have to take time to make sure each NPC is clicked on by the relevant toon. I'm sure also that the combination of shift+ctrl+delete is the wrong way to hand-in and pick-up quests. I know there's an interact with target Key map but I'm not sure how to use it. Would you have to make sure all toons got the correct target first? And, how would you do this?

You will have to set a key bind in game to set Interact with Target. Then you'll need to make sure you have that key in your keymap. If you enable click to move, your characters will run to the target you use the interact function with. As far as lining up your windows, you can also set keybinds in game for camera angles.