OK. First timer---I did not play DD. I began the game with me being a Wizard and the DK a warrior. I still pretty early in the game. We are level 4 or so.
Problem is, I cannot complete even some simple things. It's getting me frustrated.
1-Can't find the bone tooth or whatever the Imp wants.
2-On that same level, I can't open the door in lower SE corner.
3-My wizard can't cast more than 1 or 2 spells before he runs out of mana.
This is frustrating since I put 4/5 points into Intelligance with each level up. I assume Intelli helps mana/casting.....?
4-I don't follow the 'trading' system. It appears like I am forced to trade and cannot buy outright with gold?? In other words, it seems that I must sell gear in an amount close to equal to what I want to buy. I can't seem to figure out how to just pay gold---it keeps saying I don't have enuf money if I try.
5-Can't figure out how to move the statue.
6-Can't figure out how I can get back to the area with ghosts. I think it is one level up??

I'd appreciate help.
Thanks
Howie