No problem :)
1) There is no specific option for this in the JobRoller admin dashboard, so it would require either the use of a plugin or some modification in order to make this happen. From a quick Google search I see
this plugin, however as it hasn't been updated for some time, and it may not be compatible with custom post types which our themes use.
2) Again, this is not a default function in JobRoller, so you would still need to make the modification. Potentially yes, it could be done.
3) AppThemes do not officially support third party plugins so we cannot guarantee that all plugins will be compatible with our themes. In saying this, I have seen mention in our forums of a customer using gravity forms integrated into JobRoller with some minor modification to the default theme in order for the plugin to function correctly. Thanks.