Hi,
1. Your filters in the URL are plenty readable.
site.net/properties-for-sale?limitstart=...m_7=filter_Bedroom_7
As I said, the texts filter_DesignorType_1 filter_Price_2 filter_Sort_3 filter_Type_4 filter_Bathroom_6 filter_Bathroom_6 filter_Bedroom_7 are the namekeys of your filters and you can change these in phpmyadmin to whatever you want.
What's left in your URL is :
- "limitstart" which can't be changed... it's for the pagination system.
- the "65" is the value of the filter. It can be changed to text if that filter filter_Type_4 is based on a custom product field. If it's based on a characteristic or categories, it can't be changed.
There is nothing else in the URL.
2. I don't understand your question. These texts are not in the URL you provided, so I don't understand what you want to change where.
3. Are you talking about the "tags" option you can find when you edit products ? These integrate with Joomla's tag system and it can't be easily integrated to the filter system. In that case, instead of using tags, I would recommend using a custom product field and then you could have a filter on that custom field.