Look here for how to post code properly on the forums: Using code tags properly
As for your issue, try changing ‘start’ to ‘Start’ in the first script. The method names are case sensitive.
Since it’s difficult to tell which line is which, the way you’ve posted your code so far, if that doesn’t solve your problem, please edit your post with code tags and indicate which line # the error is on, if it doesn’t match up to the pasted code. 
Welcome to Unity!