You will need a basic cleaning kit (rod, brush, patch holder, patches, powder solvent, oil) and you should have the owner's manual. Please contact Ruger customer service through the Ruger website, and they will send you one. Free. Free is good.
Go to the Ruger website, under customer service, historical data, rifles, select your model, find serial number, and it will show year of manufacture.
Ruger's website has extensive sn data.
100-500
Depending on condition, and WHICH version of the M77, between $250 and $500.
Unknown caliber. Contact Ruger
If the Ruger website is up, it has sn data.
The Ruger website, under customer service, historical data, rifle, M77, will have the serial number ranges for each year of production.
Strong enough for factory loaded ammunition and hand loads that don't exceed SAMMI standards.
100-400
Remington 700 308?
50-700 usd
Long