As I write this in early 2010, the model 11 is more than 50 years old. Depending on condition, they are worth from $125 to $300.
100-300 USD
100-300 USD
Model 58 is an automatic not a bolt action
100-300 USD
$32,500,690 at least
Your question answers itself.
Tough question, the Remington model 550 is a .22 rifle not a 12 gauge shotgun.
100-400 USD
800
30p
Browning did not make the Model 11, Remington did. If you have a Remington Model 11 in 16ga, value is between $150-$450.
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.