No. Two entirely different cartridges.
50-200 or so
Yes.
rsi would say the value of the spanish mauser and bayonet value at 695.99 dollars
Define 7mm. Do you mean 7mm Mauser ( a little less than 30-06), or 7mm Magnum, (a bit more than 30-06)
You will have to call Browning with the serial number.
No, they are not interchangeable.
The serial number indicates a Model 1893 Spanish Mauser manufactured in 1921. Yes, it would be a 7mm with gas exhaust hole on left.
Bayonet; 10-50 USD
Based on a single source* the Model 1912 7mm Mauser, very similar to the German Rifle Model 98 was a standard issue for the Mexican Army in 1935. Mexico adopted the 7mm Mauser Model 93, in 1895, a similar rifle to the Spanish 7mm Mauser Model 1993. During the period of 1910-1920 many difference rifles were obtained, including the Japanese Tpe 38 rifle. In 1936, a Mauser of Mexican design was adopted. The design was a 7mm Model 1936 designed from the Model 98 Mauser with an external "cocking" mechanism like a Springfield Model 1903A1. *Ezell, E. C.(1977). Small Arms of the World. 11th Revised Edition, Stackpole Books, Harrisburg, PA 419-420 pp.
50-200 or so
$0 to over $1000. There's no way to be more specific without knowing what type of rifle it is. All we can determine is that it fires the 7mm Mauser cartridge. There are a lot of rifles - both military and civilian - which were designed to fire this cartridge.