1. The currency of the Caladin Nation is at the momeny tresured silver coins, in whihc there are many. Ten silver coins, in Caladin, makes up for one gold coin and ten gold coins make up for one mythril coins. In Talahar, you would have to ask Beowulf.
2. The timeline is the past( High Fantasy)
3.Any class could join, since it is planning on colonizing new lands, many types of people would be needed, for say, blacksmith, weaver, any occupation you could think of is allowed.
4.There would be allowed demons, but demons are known to be evil and very powerful, so it would be best to be another race, like elf, human, dwarf, ogre, troll, orc, vampire, or anything else.
5.There is magic allowed, but you will have to PM the DM on what the magic is, if it is powerful.
He means that the island is made up of many lakes and rivers and like you said, swampy. So hard land, like to make a village, is a rare place.