Aradel was smarter than THE average dwarf. Moreover, this is a run on sentence, it can however be remedied.
"... had saved him many times. One such time was from a bear, who had decided to help itself to his equipment."
Putting why a bear might want to use equipment aside, it is a grammatically correct fix, even if a bit out of place in the overall narrative.
The first sentence and the last run on, and the second is a fragment. After wooden spear put a period and capitalize "this". You could put an oxford comma after "treasured moment" if you want to be tidy, but it is unnecessary to say the least. The next sentence, as previously mentioned, is a fragment. This can be fixed by simply adding an "and" before "he was driven away". The third sentence is a real mess, but can be consolidated and cleaned in a manner of ways. First, summarize his losses into merely "He had lost his entire family". If you want to be specific for some plot reason, you could specify something like "including his beautiful wife and newborn babe," but the list you currently have is unwieldy. After this put a period of course and then clean things up by saying "Aradul had nothing left in this world except the clothes on his back, and the fire in his heart." Its rather cliche, but come on your family was killed and you are setting out for answers, I don't think you are looking for a pulitzer. All in all, you really need to watch for run on sentences, and keep the lengths varied in general for a more enjoyable reading experience.
Quite a few spelling errors, such as occasions, thieves and thief, and detached. Other that this you have the same issues with run on sentences as in the previous excerpt. I could correct these if you like, but it is fairly low level grammar and I am sure you can remedy them with what you already know, and with what I have previously written. Make sure you vary your sentence length, use proper syntax, and just use an online thesaurus maybe to get some spice into your diction.
Overall, I have seen worse.