All views in a workspace can be exported to another workspace. This includes:

Yes, you can copy views from one Organization to another. All the workspaces in Own and Shared Organization for which you have administrator privilege (Org Admin or Workspace Admin) will be listed in the Export to other Workspaces dialog. Select the workspaces to export the views.
Yes, you can. If all the related/dependent tables from the source workspace are exported to the destination workspace, the lookup relationships between the tables will be retained.
In case any of the related tables are not present in the exported workspace, you can choose to remap the views to the tables in the destination workspace manually.
To learn more about remapping a table or column while exporting views. Refer here to know how to join while importing.