You can request a owner's manual from Remington's website.
The 1100 designation for a Remington shotgun is the model number. Remington makes the 1100 model in a trap version and a field version.
100-1000 depending on specifics
LH Model 1100's have been made. LH Model 1100's have been made. LH Model 1100's have been made.
500 or so each.
50-350 usd
I could be wrong, but I believe it was Sears/Roebuck.
$32,500,690 at least
between $200 and $1100.
100-1000 depending on specifics
No, a 12 gauge Remington 870 barrel will not fit a 12 gauge Remington 1100. The two shotguns have different designs and systems; the 870 is a pump-action shotgun, while the 1100 is a semi-automatic. Their barrel attachment mechanisms and receiver dimensions differ, making them incompatible with each other.
100-350 or so
A newer Remington 1100 is values around $700 to $800 They can be had for $300-350 in good condition used. It depends on gauge and condition but for used $450 is getting high. These figures are in US dollars.