Ok.

Can armor defend against a poison?

When you attack with a weapon you exhaust your hero and the weapon?
Can a weapon be used when you are exhausted?

Can all characters duel weild? If a weapon has a (1) on it does that mean you may only use 1 of that card? So a different weapon can be in the other hand? (unless of course its a two handed weapon)
How does a bow enter in to this?

Are there specific rules in team play. We play 2-on-2 alot.
When someone says exhaust a character for this turn, when the next guys up that turn is over so unless you're using that ability on a protector you really aren't getting much out of that play. right?

Thanks for your patience and help
It is always greatly appreciated.

Let me see if I can get all of this.

Armor prevents damage, so unless a packet of damage is unpreventable, armor can be exausted to prevent a certain amount from that packet of damage. (So, yes it can prevent poison damage.)

Unless a character has the ongoing 'dual wield' in play, they cannot dual wield. They can carry a weapon and an off-hand (like a shield) or carry one two handed weapon. I believe a bow can also be carried (I don't play hunter, this one eludes me.)

In 2v2 your seating order is technically going to be ABAB as you sit around a table, if one team is A and the other team is B. That way when abilities ask for the player to the left to respond to something, it will always be asking an opponent of yours. Also, turn order is passed around the table in that same manner, ABAB. So one team isn't going all at once.

Abilities that simply exaust, like say the warrior abilities, just exaust the person for that turn. In that case the character would ready at the start of their owners turn. The palladin and Rogue exaustion abilities on the other hand say that the person does not ready at the next ready step, so in that case at the start of their owners next turn they will stay exausted, and they will have to wait till the turn after that.