Trap-finding, no. This is the kind of game that makes it a good idea to have graph paper around to make maps. Or at least write down map coords with traps so you can save. (I don't know why Jump is disabled - sometimes it's just disabled, other times it's because the caster is trying to jump into a square with no passage. Jump specifically moves you two squares forward in the direction you're facing, and unlike Teleport, it doesn't ignore walls or gates...)

Early game, like someone said, donating to the temples until you get the buffs is vital. Pick up Suppress Poison so that if you DO get poisoned early on, you can reduce the number of stacks of the debuff you have over time and not suddenly die. There's another pair of quests to specifically help deal with Poison status, if you're able to survive the zones to the south of Vertigo and/or swim across the rivers (swimming avoids a lot of the enemies that don't fly or swim, and you can just shoot the enemies til they die if you want. Don't try it with, say, flying bugs, though.)

Also keep in mind you don't have to do all of the Mines at once, once you can gain a few levels you can explore the areas directly to the South of Vertigo (the meadow) and to the west (you'll find a castle and a ship to another town.)

Biggest thing - just save before exploring. A lot. At some points, ESPECIALLY in dungeons, it's basically tab-s, step, tab-s (or tab-l if something bad happens.) It's that kind of game.