Though it is possible to add negative borders to digital images, I'm going to assume that these are scans of film and that you are wanting to get into film photography...
The image ratio on these appears to be 6x7, which is the largest "normal" size for medium format cameras using 120 size film. (There are panoramic cameras that use 120 to shoot some very wide shots)
Example cameras that shoot the 6x7 format are the Mamiya RB67, Pentax 67, and Fujifilm GF670. This list is by no means exhaustive.
Additionally, other medium format cameras use the same film but shoot other ratios, such as 6x6 and 6x4.5. Since they all use the same role of film, the number of frames you'll get per roll is highest with 6x4.5 and smallest with 6x7.
Example 6x6 cameras include the Hasselblad 500 and Rolleiflex.
Example 6x4.5 cameras include the Pentax 645 and Mamiya 645
Something to note is that many of these cameras have swappable backs, or swappable film containers. It is very possible to use a 6x4.5 back on a 6x7 camera (if the gear exists) but it is not possible to use a 6x7 back on a 6x4.5 camera.
So, if you wanted the equipment to pull off these exact shots...exactly...you'd need to look for a medium format 6x7 camera. If you wanted to be in the ballpark, you could go with a medium format 6x6 or 6x4.5 camera.
Keep in mind that, because of the size of the negative is bigger, the whole camera system is bigger than perhaps anything you're used to. If this is a deterrent, but you still want to shoot film, then look for any of the plethora of 35mm (135 film) SLR's or rangefinders on the market.
I don't believe any of these are made new anymore, but they come cheap on the used market. Keep in mind that you'll also need lenses - which matter far more for the shot than the camera. A 75mm or 90mm lens is good to get you started, and once you have some experience, you can decide if you need a wider or more telephoto lens.
The worst thing you can do in photography is screw up your exposure (well, maybe not the worst but it's up there). These images were all taken on a cloudy day and the exposures look good, with the exception of the blown sky in the last. No additional lights/flashes appear to be in use.
So, you can easily take images like these, assuming you have the camera, some Portra 400, a cloudy day, and a model.
Since exposure is so critical, and since many of these older cameras don't have any automatic functions whatsoever, you need to begin your journey by learning about exposure.
You can then further learn about composition, depth of field, angle of view, light modifiers and mixed lighting and strobe only lighting. If you want to begin shooting black and white film, you should also learn to develop it at home. There are even more topics than these, but even just exposure and composition are enough to get you started and continue learning for a bit.