As explained above, you can get Page object using this code. resourceResolver.getResource(PAGE_PATH).adaptTo(Page.class);

Please check "Map to property" field in Schema of that property. It should be something like ./jcr:content/metadata/propertyName.  

If you are able to fetch siblings of current page, then same logic you can use for other pages as well as you already have a path. You can use ResourceResolver to get Page resource and use same logic. resourceResolver.getResource(PAGE_PATH).adaptTo(Page.class); To get siblings, you can just get Pare...

In that case it should not be an issue due to upgrade to 6.5.13. Please check what exactly is the difference on environment which is causing the issue. Seeing the pop up error, issue looks more of a user permissions.

I updated schema to add a new tag field and that too is working fine. Please try in vanilla instance once, it should work fine.  

I always prefer referring to we-retail website for following best practices. You can divide CSS based on components which can be later used to add in proxy components like this. Please refer we-retail website on your local as it also uses core components.  

Please confirm by Image properties you mean Asset Properties?  I tried same in 6.5.13 on one of the we-retail Assets and I am not facing this issue.  

I could get below query closer to your requirement but its does not support finding component to n level. After getting the list of components ,you can write a logic to see if the page is Activated or not. 1_property=jcr:content/cq:lastReplicationAction 1_property.value=Activate 2_property=jcr:conte...

Please go through Geocoding API provided by Google Maps. It helps in converting addresses into geographic coordinates. I tried using different zipcode and it worked fine. Link : https://developers.google.com/maps/documentation/geocoding/overview

For any issue related to integration/communication with Khoros, I think right contact would be the Khoros support team as it would be API based.There is not any document for AEM - Khoros Integration but as you mentioned you can to integration using Rest API provided. You can refer API documentation ...