How To Format All Caps Text Into Properly Capitalized Text

I have a few tasks which I have been doing manually because I do not know if there is a way to accomplish these tasks automatically via some excel formulas.

My first task requires me to take an address, for example: 1234 CAMBIE STREET, and format it such that it is properly capitalized (only capital letters in the front of words) like this: 1234 Cambie Street

My second task involves taking an address, for example: 1234 1st Avenue W, and rearranging it such that the direction is in front of the street name like so: 1234 W 1st Avenue. What makes this task potentially even more complicated is that not all the addresses I am working with require the rearrangement, so I can't simply have a formula that puts the last group of characters in front of the first group of characters because that may screw up addresses that don't require this formatting.

My third task demands that 2 columns of names are combined into one column, while also simultaneously placing a "&" between the names. For example: Jonathan Parkinson | Sarah Parkinson turns into Jonathan Parkinson & Sarah Parkinson. Now I do understand how to use a simple combining formula (=a1&" & "&b1) but it isn't that simple. The columns are not all filled with names. Some pairs may have no names, whereas others may have only one name. Because of this, the formula I used as an example will result in many instances where all I see is a "&", and other instances where I see the first name, followed by an unnecessary "&".

So far, for the majority of these problems, I've been using a combination of manual data input, and the replace function, but I really do hope there is a faster and better way to go about these tasks.