This is a driver set. It includes a handle (the green item), several bits (lower left) and several sockets (upper left). The long items in the lower middle is an extender. One of the items in the bit tray is an adapter to allow the handle to accomodate the sockets.
The bits make it a multi purpose screwdriver. The sockets make it a nut driver.
The plane iron may also be ground slight differently in shape (as opposed to angle)... but yes, those are the largest differences. They do affect how the plane is used.
A longer plane improves its ability to accurately flatten a surface (it can level out wider-spaced hills and valleys where a shorter plane would just follow the curves). But depending on what you're doing, the additional weight may be tiring or may be helpful -- harder to lift, but the weight helps keep the iron in contact with the wood.
The ideal hand-tool woodshop has a range of planes from jointers (long) all the way down to block planes small enough to hold in a hand, plus various specialty planes (shoulder planes, rabbeting planes, router planes...) each of them having its own trade-offs -- just as the ideal woodshop has a range of chisel sizes and types. Most of us don't have ideal shops, and that's OK. You can do the same jobs with a smaller setup, it may just take more work and care.
If I had to pick just one of those two, I think I'd have gone for the #4 first... but that may be personal bias; I've already rescued several of that size from various garage sales, and because I haven't had to do serious smoothing/jointing yet. And I'd suggest a block plane as your second purchase -- they're light enough to carry anywhere and more useful for spot-trimming than you might think.
If you do buy a 9" plane, it's seriously worth considering a low-angle plane (lower bedding angle, higher angle on the blade). Among other things, that gives you a wider range available if you need to grind blades to other angles when handling special cases. These do tend to be a bit more expensive, though, largely because this design is mostly offered by the higher-end manufacturers.
(Edit: Yes, I know, "long jointers are long, duh". Redundancy fixed.)
Best Answer
The top tools appear to be dies - used for cutting screw threads on rods. The lower tool appears to be a tap wrench (a tap is a tool a little like a drill bit, but used for cutting threads inside a hole). The "winding and unwinding" action is to allow it to clamp to the tap; the wrench is then used to turn the tap in the hole. The dies would also have had a wrench or handle with which to grip and turn them around the workpiece.
They are for use on metal.
See Wikipedia- Tap and die for more detail.