By looking at the barrel and receiver.
The model 1906 was only made as a .22 caliber. It is also a slide (pump) action while the model 94 is a lever action. A model 94 made from 1894 to 1929 should be marked "Model 1894". If a model 94 is a .38 caliber it should also be marked "38-55 WCF".
Should be marked on the barrel. If not, take it to a gunsmith.
$300
300-550 dollars.
$300
It is a Stevens Model 1929.
300 USD
$300
100-300 USD
Around $300, depending on condition.
$250-$300
Depends on condition. Range from 300-800