Post 4. I THINK the shotgun on the left is a Parker, but not certain. Not shown in my 1901 Sears catalog, but competitive L.C. Smith and Ithaca shotguns were $26 and up. Way up if you wanted to squander a hundred bucks on a shotgun.
The rifle in the middle is a Marlin, probably an 1893, caliber .30-30 or similar. Price $13.25 which is actually more than the '94 Winchester at the time.
The rifle on the right is another Winchester 1873.
Note that the guy with it has a revolver on his belt. If I cross my eyes and squint, I can imagine it is a large frame Smith & Wesson topbreak.
He is wearing a belt full of shotgun shells. Wonder why.
Post 5. I think the rifle is an 1886. An 1892 is similar but smaller. I believe it has a pistol grip Caliber .45-70 or any of a number of calibers of somewhat similar size and power. Price was $14.97 for the straight grip, I don't know if the pistol grip was an extra cost option.
The revolver is a nickel plated top break, maybe Smith & Wesson but there were a number of lesser brands of similar appearance, Iver Johnson and Harrington & Richardson the best known.