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I think for your second question changing units of measurement you can set that under Edit > Preferences > Units & Increments (Windows) or InDesign > Preferences > Units & Increments (Mac OS).
For more on that you can read the article : http://help.adobe.com/en_US/indesign/cs/using/WSfd1234e1c4b69f30d2a5051004d659b1c-7ff0a.ht ml#WSa285fff53dea4f8617383751001ea8cb3f-7140a
I am not entierely sure about your first question but if you are trying to change the document orientation you can do that initally when you create a new document or go under document setup dialog box you the folowing buttons:
Or if you are just trying to change the view you can do that under the pages pannel.
Set up as facing pages, in protait orientation so the spine is on the long edge. You can rotate the spread view in the Pages panel.
this is perfect! thankyou so much!