Need to know a make, model, and description of the stamps. The British used more than one service rifle during that time.
50-300 or so
Nothing more than face value - unless there's something that makes it unique.
Ive seen them fo £30 to £40
50-150 or so
There are many ways one can learn the value of stamps from Japan. One can learn the value of stamps from Japan at popular on the web sources such as Baxley Stamps and Herrick Stamps.
100-1000 USD depending on specifics
50-500
50-500 USD depending on condition, variation, accessories, etc..
50-150 USD or so
Value entirely depends on what stamps are in the album. Without knowing what stamps, country and condition, it's impossible to value.
Assuming you mean a British MILITARY rifle, such as the SMLE, between $100-$350, depending on condition and originality. Rifles that have been "sporterized" lose much of their value as a collector's item.
Top Value Stamps are no longer in circulation. They were a redemption program where stamps were collected and exchanged for merchandise from a catalog. If you still have Top Value Stamps, you would not be able to redeem them as the program no longer exists.