As far as this gun really has no value other than to me...right?
Well, it has no value to collectors, they like military rifles to be in original condition. As it sits, probably $150-200, if you find the right person.
So was this made in 1936? And would this have been a gun used in the war?
Yeah, German Mausers were marked with a factory code and the year of production. There should be a code under the sight base, that will tell which factory made the rifle. The codes changed periodically, but for 1936 they are:
S/42-- Mauser AG Oberndorf
S/147--J.P. Sauer & Sohn Suhl
S/27--Erfurter Maschinenfabrik ( ERMA )
S/243--Mauser AG Borsigwalde
S/237--Berlin-Lübecker Maschinenfabrik
On the left side of the receiver ring, there will be the serial number/series mark, and property stamp, the stamp will be a Weimar eagle, even though the Nazi's had been in power for ~3 years, they hadn't changed everything yet, and the property stamp and inspection stamps (called
Waffenamts). The Waffenamts should have a number that would point back to the manufacturer. There is clearly one on the floorplate, there are some marks on the right side of the receiver ring (but too small to see in your photos), and possibly on other small parts. The stamps switched from the Weimar eagle to the Nazi Eagle with swastika in 1937, although some rifles will have a mix of both types.
The bolt would have had a serial number originally (as would pretty much every part), and may have had numbers on some of its parts, like the safety, extractor, extractor collar & cocking piece (although possibly only the last 2 digits depending on the size of the part). From your photos, the rifle S/N matches the floorplate, and I think I see a 20 on the bolt stop/ejector (the little lever you use to remove the bolt).
The stock would also have the number stamped in the barrel channel.
Did your dad serve in WW2?