1. In all examples of map set up for wedge throughtout the rules (and walkthrough) the picture shows Tile A with Tile 1 and 2 attached. When setting up a game with a wedge map is it always tiles 1 and 2 that are laid out with starting tile A or do you randomise the starting areas every time?
They are randomized each game.
2.Had a spell card that showed a blue mana symbol. The text said something like 'when you play this card pay a mana' and then it listed effects of spell depending on what colour mana you used. Does this mean you have to pay a blue man to play card and then another mana to get effects stated on spell text?
The mana cost listed in the spell's text is over and above the blue mana required to cast the spell. With all cards, a cost listed in the text does not overrule any other costs associated with playing the card.
3. One of the day tactic cards allows you to place a mana die from the source on the card to be used in one of your turns. If you decide to use this die from the tactic card on a turn does that count as your limit of using mana from the source?
No, as it is not in the source; it is on your tactic card.