94 is the middle of the road action, chambering modern (at the time) smokeless cartridges.
The 86 and 92 are identical in function. The 86 being the larger, for the old black powder rifle chamberings, and the 92 for the pistol type cartridges. These two are the nicest and most slick of the winchesters, and quite strong.
The 76 and 73 were the prior models to the 86 and 92 respectively and serve similar function. These two, however, are more for the nostalgic crowd than intended to be put to hard service. They use a toggle link action (think of a knee joint and leg sort of deal under the bolt) for both function and lockup and are therefore considered to be weak by modern standards. Modern ammo MUST be loaded to black powder pressures in these two.
For an all around gun like you want, the 86 92 94 95 are the only ones to really look at.
If you like pistol chamberings, the 92 is the smallest and lightest. The 86 is quite large and somewhat heavy - That's your choice for the 45-70. The 94 is in the middle, and not a whole lot bigger than the 92 - that's your goto for cartridges in the 30-30 family. The 95 is the strongest of the lot, is/was available in 30-06 (and other military chamberings of the era, but modern ones are '06 or 30-40krag) and had the advantage of using a vertical stack magazine instead of a tube, meaning spitzer bullets are now on the menu
Winchesters are also mostly iron sight guns. I use aperture sights on mine
That's a REALLY fast n dirty rundown for you
