The 'Iron ons" look like they're for embroidery, which I don't do, so I may be way off base with my suggestion. I suggest trying at least one of the "iron ons" as is to find out if they are still useful as "iron ons". If not, and you like some of the patterns, scan them into your computer and, if you decide to use them can either trace them or print them on iron on fabric. If you have a sewing machine that does embroidery from a pattern, can these patterns be digitized and used that way?
Spools of thread - looks like you have quite a few threads with wooden spools. Test the thread by seeing how easily it breaks. I'm told that it's no good if it breaks easily. The spools themselves might be worth something to a collector or a crafter!
Bobbin thread - What size are the bobbins? I know that size "M" bobbins are made and sold for long arms, so that's a possibility. Again, their usefulness is probably dependent on their age.
Perhaps other, more knowledgable folks on this board can give you better info. At the very least you have some history in your possession!