'Run-of-the-mill': it means ordinary in the sense of dull and uninteresting. Something which is run-of-the-mill is unexceptional; it's not notable or inspiring in any way. If you describe a person, a thing or an experience as run-of-the mill, it generally means that you are disappointed that it isn't more fun, exciting or original. It wouldn't be common to describe tools in this way. Pliers and so on are everyday household tools or maybe standard household tools. These adjectives get over the idea that everyone has these tools and that there is nothing specialist or unusual about them. I hope that helps.

Yes, that sounds fine. :)

Yes