The Mossberg 151M (note the spelling) was only made for 2 years- 1946-47. Since these rifles never had a serial number, can't narow it down more than that. Very nice rifles, by the way.
The only way to know which brand/weight your weapon likes is to shoot as many different types as you can afford.
Nope, sorry.
No way to tell. You can look up that patent, and it will tell you what year that patent was granted- but there is no way of telling when it was made, other than AFTER that patent was granted.
Only you can tell by the way you feel and they way the person made you feel.
Start out with of what you feel like. And what made you that way.
No, souls are from a religious body. There is no way to tell that souls exist or not. I believe they do but there is no way that evolution made souls.
There are 2 different Mossberg 151's- the 151M (wood goes all the way to the muzzle) and the 151K (wood does not go all the way to the muzzle, but stops with a rounded bump- called a Schnabel) There is collector interest in both, the 151M is usually worth a few dollars more. Value will depend on condition and completeness (rear sights and Mossberg sling swivels are pricey to replace if missing) Value may range from $125 to $250 for a minty specimen.
Right now there is no way to tell. Nobody keeps track of it.
The best way to tell what year a wooden horse rocker was made is to take it to a specialist. They will assess the rocker based on materials and techniques used.
You can't tell this way. The only way to tell is to ask her.
No way to tell without a detailed description
Only way to even begin to answer is if you tell who made it and what condition it is in.