This is the picture of some of the cameras my friend has, apparently still got more stuff to sort through - can't wait
thumbnail by
woody174, on Flickr
That's an interesting and varied haul you have there. Here's my two-pennorth on how to approach them.
There are two Minolta SLRs which look as if they are both autofocus models, probably from the 1980s. If they work properly then these will give you a user experience which is most likely to be the closest to using a digital SLR. By that, I mean that you can use them in auto-exposure mode as well as autofocus, and they will also autowind the film. However, because they make extensive use of electronics, they have a relatively high-risk of having a fault due to circuit board failure. If you have fresh batteries of the correct type loaded, then you will get a good idea once you switch them on. If they don't switch on with fresh batteries, move on to the next camera in your haul.
The Olympus SLR (I can't tell the exact model) is of a different nature because it has manual focus only, and manual wind on. It still needs a battery but has fewer electronic parts and arguably is more likely to fully functional than the more recent Minolta SLRs. Many film camera users find these older cameras to give a more pleasing experience than the auto-everything models, but that is subjective. It looks like the attached lens is a wide-angle - perhaps there will be a standard lens to complement the wide angle.
The Zorki is rangefinder camera so you will see two superimposed images in the viewfinder, which you have to match up to focus. The lenses are interchangeable (from a small range compared to SLRs) and it looks like there are some other lenses for the Zorki behind it in the image. I've never personally used a Zorki; there are many enthusiasts for these Russian cameras but others find them a bit idiosyncratic.
The Lubitel 2 is another Russian camera, this time a twin lens reflex. I haven't used one but I do have a later model, the Lubitel 166B. The 166B is capable of taking of high quality images - it is a medium format camera, which takes 120 film and produces images about 4.5 times as large as 35mm - but it can be difficult to frame and focus the image.
Finally there is a box camera which I can't identify, possibly made by Kodak. This probably has a single shutter speed and one or two apertures. It might use 120 film or 620 film. The dimensions of 620 film are the same as 120 film but the spool has a smaller diameter; there is no 620 film made now so various hacks are used to adapt 120 film for use in 620 cameras.
There is a good chance that you will find manuals for these cameras at
https://www.butkus.org/chinon/index.html. They are free to download and you can make an online donation to Mike Buktus who provides a great service for the film photography community.
My personal advice would be to start with the Olympus SLR, or the Minolta ones if you prefer, and leave the others until you have a bit more experience.
Enjoy your haul !