Hi,
Sorry to say that there is no public transport from Laguna Green other than a school bus for the younger children to go to the school in Torrenendo.
I believe that there is a bus from Vista Bella but not sure when or where it goes. You will not survive without a car here and although I have had no personal dealings have heard that Framel (I think) motors in Bigastro are good to deal with and if you are a holiday home owner they will arrange to collect your car from airport and store it until your return, you just e-mail them the details of your flight..
Hope this helps