Forms in Acrobat

#1: It does not matter: You can either use a radio button group, which will handle this automatically, or you can use checkboxes, but all checkboxes need to share the same name, but have different export values (let's call this a checkbox group). The only difference is that in a checkbox group, you can deselect the selected item by clicking it again, a radio button group does not allow you to do that. You can have the same appearance for either one by changing the Check Box Style.

#2 You do this with a custom calculation script of the filed that should display the name. Something like this should work (assuming that you actually use the package name as the export value for your radio buttons or check boxes):

event.value = this.getField("PackageType").value;

If you don't use the correct name, you need to lookup your name:event

var pkg = this.getField("PackageType").value;
var pkgName = "";
if (pkg == "Option 1") 
    pkgName = "Bronze Package";
else if (pkg == "Option 2")
   pkgName = "Silver Package";
else if (pkg == "Option 3")
  pkgName = "Gold Package";
event.value = pkgName;

#3 You would use a similar approach as for #2is

You are in programming territory here, regardless of how much experience you already have with Acrobat forms. This requires that you know how to deal with JavaScript, and unless you are wiling to learn, there is nothing we can do to make this easy on you. If you are willing to learn, take the time to work through a good JavaScript resource. This eBook is pretty good: Beginning JavaScript for Adobe Acrobat

If you are stuck with a non-Acrobat introduction to JavaScript, take a look here: Learning to Program JavaScript for Adobe Acrobat - KHKonsulting LLC