What's the difference between go walking, go for a walk, go and walk and take a walk? When can I use these expressions?
When you wish to refer to words as words, or to phrases as phrases, it is good to place them between quotation marks or in italics.
You can use "go walking," "go for a walk," "go and walk," and "take a walk" fairly interchangeably; however, "go and walk" sounds rather unlikely to me.
We usually use "go and [verb]" when "go [verb]" can also be used, informally. We generally say "go walking/run" rather than "go walk/run." But both are OK.