Hello and welcome to SilkRoadOnline
1 - It's actually based on ur builds. Usually, spear and sword, people would make a Pure INT. Because those 2 weapons actually good in magical attack. Blade & Glavie are usually a Pure STR weapon because of it's physical attack power. And bow, it depends though but i'd recommend STR.

For a glavie user whom goes for Pure STR build, yeah, they'd go fire as the main force and passives from lightning (Grasswalk). For more info, try searching under Characters & Skills.
2 - STR is known for physical attack and INT goes for magical attack as far as i'm concerned. So yeah, this is based on your char's choice. There is no DEX though
3 - If u mean by a place to sell or buy items, yes there is. They're called NPC which is provided by the game. They served for u to buy from them or u sell to them. For players, they could open stall and sell their things under any price they want.
4 - Nope, there is no other place where u can store ur items. There's only NPC storage and when u store things into them *deposit* , u need to pay a price for it. It depends on ur item though.
Hope you'd gain something from here. Just post a new topic or pm me if u need help. I might check it out.
Enjoy the game. ^^
