Just to add to Nicholas's answer, the first is very rarely used, the second is commonly used, and the third is so unheard of I wouldn't use it. I looked it up and apparently it means the same as "living large" but if you use it no one will know what you mean.

One's fingers are all thumbs can also be said as I'm all fingers and thumbs. It means I am clumsy. You may say this when you drop something. To be in the autumn of one's life. This refers to your age. Spring is new life - when you are born, summer would be when you are 20s-40s. Autumn of one's life means you are getting old. I have never seen your third idiom before.