The rifle might be in the 100-1000 USD and up range depending on specifics
You really need to get it appraised by an expert. Value will vary dependent on condition, whether or not all parts are matched or not, original finish or refinish, whether or not it's been sporterised, what accessories come with it, etc.
How much does an 1899 German made Mauser 6.5x55mm worth? Or how much would one cost to buy??
10000.00
$75
Depends on whether this is a pistol or a rifle - Mauser designed and produced many guns. Also, what condition it's in.
50-500 USD
1k and up depending on specifics
Bayonet; 10-50 USD
50-200 USD or so
$150 to $250
A 1940 Mercury dime (not Liberty) is very common. If it shows any wear, the value is just for the silver, about $1.90.