Regex Remove Unmarked
===

I am having problems with some Regex; I need to find everything in between quotes and everything not in between to be deleted. Now marking the quotes is easy enough just simply

    ".*?"

with dot matches new line (matches newline). So now I have everything marked that I need, can I simply just delete everything NOT found by this search? Why is it so difficult to do this--delete unmarked text; the concept itself is extremely simple.

I am using Regex on notepad++.

Next, I'll need to remove the first 2 quotes, unquote *x* quotes after this and format in the way shown below. But I am struggling with even the basic concepts so far; I need someone to put me back on track.

    "foo" "bar" "..." "..." "..." "baz"    -->    ..., ..., ..., baz

and
    
    "foo" "bar" "" "...                    -->    ......, baz
    ..." "baz"

