Cameras Switch Based On Button Click

I am trying to set up something in unity similar to what is showcased here…

How Matterport Works | Matterport if you click on any of the exploremodels you get a gui with a unity file and I can click fro walkthrough to plan to dollhouse.

Anyone have any suggestions for me quickly setting this up using either an app already available or some other suggested path.[25722-4-23-2014+11-03-23+am.jpg|25722]

if(Input.GetKeyDown(F1))
enableWalkThroughFirstPersonCamera()

if(Input.GetKeyDown(F2))
enableIsometricTopDownCamera() 
// possibly, didn't look at vid but I assume that's what it is

if(...F3))
enableThirdPersonCamera()

Details, examples, videos, tutorial on cameras are all available from many excellent sources