In the starting section of Broken Valley you can find a necromancer who can create a creature out of body parts you collect (he has weaker basic parts if you don't find one of everything: head, torso, arms, legs). You will not be able to actually summon the creature until you complete a quest for the necromancer, which requires access to the rest of Broken Valley (and are about level 12, or so).
Gems and ore are used as enchantment ingredients. The first enchanter is to the far west once you have access to the main section of Broken Valley and then north. Malachite gems are rare; anything else can be easily replaced once you have the battle tower, about half way through the game.
There is a chart near the end of the topic
Gamestar Review-Box Translation from GameStar.de with various CPU/GPU/RAM options, and how they would expect the game to run on that system (see the reply for a translation). This is a little out of date, as updates from the second German patch are included in other more recent releases, which improved some graphics quality (among other things) and added additional graphics options. It looks like your graphics card is the bottleneck, but is should run fine at "1280x720 with medium Details, all Effects activated, no Plant rendering".
