The "boost" your talking about is called X-Boost. Its a special resource in the game. Equip it and get +10% exp and gold for every battle you win. There are 3 types of X-Boost, X-Boost 1week, X-Boost 30 days, and X-Boost Unlimited(Permanent). Based on the names you know how long each X-Boost lasts. You can find all three X-Boosts in Cyseros Superstore. Enter the store and head left until you find a green orb(Cysero's Orb) Walk to it, and click SHOP.
Prices:
X-Boost 1 week: 100 DragonCoins
X-Boost 30 days: 380 DragonCoins
X-Boost Unlimited: 1000 DragonCoins
In my opinion, I would just get the unlimited(if you can buy it) the others are sort of a waste in money, even though their cheaper.
Farming for gold. Through the Vurr'men Ruins (Oaklore), Dr. Voltabot (Ash in Falconreach) or Bandit Camp (North of Robina's Zone). Alternative selling your items.
You have to buy it.
No.
Earn them
You can either train your stats in HP (hover over the stats to find out which it is), certain armors/capes/etc will give a HP boost, or get a ring from where you train Health Potions.
Hold the Ctrl button
Continously winning perfect ten times, you earn one of them
you can buy boot points at nfsw site or earn free boost by survey
You can go to dragonsgrasp and talk to Doyle and do the quest Betrayal (you will need a dragon amulet)
Press and hold the Ctrl button
yes by doing the quest of in okalore keep the one with a catapult leftside when you enter the castle
to unlock the dragon store in DragonFable go to BattleOn, talk to yulgar, complete the incredibly long fire war quests, go to Sunbreeze Grove talk to the woman there and complete primal training
there are no cheats in dragonfable