trolls don't have minions; you just got a group of other crap at the same time.
trolls are best dealt with using fire arrows and a run, shoot, run approach until you get a bit farther along.

How to BF:
First, do a few crypts until you have 15 or so of the cores. Make your smelter and kiln, and use the others to make portals as needed.
At this point you could use a fine bow. The critical to have first items are a bronze axe, which you can fight with and cut fine wood, and a fine bow, fire arrows, and the best other stuff you have on hand, and as soon as you can a cultivator.
with that in hand, kill green eyed and red eyed dwarf and trolls with fire arrows. The blue eyes and anything else, use your axe. Lay in a supply of bronze/copper/tin fine wood and core wood until you have a forge upgraded, a cooking pot, workbench upgraded, and now do your armor and weapons as you see fit (troll or bronze armor, both have pros and cons... troll can be scarce, but its easier, bronze takes a lot of ore, but its obtainable). Continue to upgrade your home and gear as far as you can push it: the enemy should be manageable now and soon the second boss will be (also a candidate for fire arrows). Don't forget to produce honey, carrot and better foods.

the key to the BF is dealing with trolls and the 2 tougher dwarf variants. Fire arrow works on ghosts too, if your weapon is not working (I think they ignore blunt mostly). From here forward, if you assume that every time you make a sound outside (not in a cave etc) it will summon a monster, you will not be far off the mark. You can use stealth as a radar to know if something is seeing you or near...