find out yourself if you don't know that your super stupid:P
use the space bar :)
Generally speaking, items found on one island can't be used on another island. The crossbow works the same way.
You use it to make the potion for the serume
you have to use the bow and arrow to climb the rock
you go to the bag and click use on crowbar and that's it
look in items bag and "press"use crowbar
Get down from the last chandelier and use the crowbar on the chained door. This'll provide an easy exit for when you need to exit. Go to the left and you'll notice a glass eye next to one of the armors. Pick it up. http://blog.poptropicahelp.net/island-help/vampires-curse-island/vampires-curse-guide has all the answers!!!!
You use it to reach the chandelier with candles on it, you have to get the purple candles and click the fire,then go and light it.
don't know a lot but i tried to push it hmm wait use the crowbar or if you're not sure go to another island
You could use Thinknoodle's Poptropica Walk through Video.
You make him eat the union. Then you use the Anti-Vampirism Surum at the end.
If you are looking for the teen book then it is in the graveyard in a shack but if you want the other book then you have to talk to the girl locked in the cage and she will tell you where it is (It is where the fire place is on the right book shelf use the ladder)