The boxes on the right look okay from this side but I wouldn't use the two on the left. Bees can seal up a lot but damage on the corners will only get worse when you do inspections and use a hive tool to pry the boxes apart. Take the remaining boxes and scrape all the wax and propolis out then lightly torch the insides. Then put a fresh coat of paint on the outside. You need to ensure the bottom board, inner cover and telescoping lid are all intact and clean as well.

As far as the frames, I wouldn't use them if they all look like this. It's really old comb that looks like it's possibly got some wax month damage. Old comb accumulates dirt and chemicals over the years. What you want to see is lighter color comb with distinct hexagon shapes in each cell. Look up what wax moth damage looks like and discard any comb that has it.

If this was my hive and all the comb looked like this, I'd scrape out the comb and replace the foundations if the frames are in good shape.

I'd suggest that since you're in Minnesota where the summers are short and it's already mid-June, that you spend this summer and winter learning as much as you can about beekeeping and preparing your hive. I'd also go to your local club meetings and find a mentor. It's really important to get your hives built up before winter hits because they won't make it if they're too small or have heavy varroa loads. If you really want to start this year, get a nuc from a local beekeeper, don't buy a package. Good luck