Above represent good advice, but it may be profitable (efficient) to normalize the capitalization before dealing with the more complex fuzzy matching needs found in item 3.
I would be seriously inclined to see if lc'ing everything, and then uc'ing first letter of each word minimizes the work.
However, this scheme is suggested on the basis of one snippet of your data; if you have to distinguish between Mr. MacHinery and (something) Machinery *OR* if capitalization on the output need be not only consistent but also "correct" -- for unknown values of correct -- you will need something far better than this simple-minded scheme.
