Installing Drupal

I have installed commerce kickstart 7 x 2.38 on my localhost wit xamp.
Now when i get to the page configure site in the installation proces , i get the following error message.
Error: Call to undefined function field_attach_load() in DrupalDefaultEntityController->attachLoad() (line 354 of C:\xampp\htdocs\commerce_kickstart-7.x-2.38\includes\entity.inc).
Can somebody help me with this?

I am in the process of setting up a copy of a running Drupal 7 site on my own Mac OS X El Capitan desktop.

I installed the current Mysql community 5.7.13; created the database; and granted all standard privileges on the db to the app user, 'ins_cms'

I can connect to mysql just fine from Bash command line... e.g. $ mysql -u ins_cms -p

I can issue other drush sql* commands from a Bash session just fine, e.g. $ drush sql-dump

When I try to load a dump file from the original site's db, I get this error, which is baffling all I consult:

I have read through articles for days. I have tried many instructions from many forums from many persons. I still cannot find a clear and concise step by step of anyone whom can explain how to install multiple drupal websites on one server. There are many persons saying they have successfully achieved the objective, but none that take the time to explain how. I want a current date (July, 2016) description of how to set this up. I have launched a bitnami drupal 8 virtual machine on ubuntu in Microsoft Azure.

I have put the files in the correct place in my host . When i try to install drupal commerce kickstart with my domain and /install.php i land on the welcome page where i have to agree and then hit Let's get started and from there i get an HTTP error500. The details of that error:

Fatal error: Class 'MessageViewsController' not found in /home/wendyvf180/domains/houtenletterborden.be/public_html/comkick/profiles/commerce_kickstart/modules/contrib/entity/views/entity.views.inc on line 30 E_ERROR Error in file »entity.views.inc« at line 30: Class 'MessageViewsController' not found

Can anyone help me?

I created a website and now people can see the folder structure, including file content!

I have extended the .htaccess file with:

Order allow, deny
deny from all

What can I do more and how can I prevent that everyone can see the folders and file content?
Thanks in advance,

I can't enable theme, modules etc. because of this error.

Fatal error: Cannot instantiate interface Drupal\Core\Cache\CacheBackendInterface in C:\xampp\htdocs\startdrupal8\core\lib\Drupal\Component\DependencyInjection\Container.php on line 268

Any help would be appreciated.