Unable to view profile instructions or see profile drop down menu in Contribution page
The labels/profile instructions look like a CSS issue, try adding the next style in your theme's CSS/Style editor:

.label {
  color: #000;
}


Regarding the back-end Contribution page not displaying correctly, please see this troubleshooting guide.

Also have a look at:

Backbone isn't loading on Civi 4.6.11 WP 4.4.1

Dequeue Backbone from theme load and load CiviCRM Backbone

It could be perhaps related to the a conflict between Civi's Backbonejs version and your theme's Backbonejs if it has one.