Fancy wire and tools aren't critical when you're starting out, but you should at least buy some wire that is good quality and a basic beading plier or pliers set that includes crimping, cutting and bending capabilities.
Once you've finished the safety guidelines above, the actual repairs usually require nothing more than a standard screwdriver, wire strippers and sometimes a pair of heavy duty needle nose pliers.
It could be that the hinge is stretched out or perhaps a screw is loose or missing.If you determine that the hinge is stretched out then use a pair of pliers to carefully bend it back into place.
In addition to being handy with this kind of saws, you need to be able to take measurements, use tools such as pliers and wrenches and most importantly, follow instructions.
With a small pair of pliers, begin by forming a small loop at the bottom of the wire that will fold against the bottom of the bottom-most bead on your dangling ornament.