First off this sounds like it should be here
. To make it a full body you would have to have someone make it for you or make it yourself. There is no Generator out there to make a full body and if there is then it's old. I am sorry I am not a graphic worker so I can not help you there. And to add to the picture in a spoiler first you got to know how to put the picture in a post.
First you upload the Picture
Then go where the Dropdown box it where Attachment is
Click on this image in where the uploaded file is:
It will place a text of something like "[attachment=25122:face008.png]
" This is a example of mine. It will be different for you.
To put it in a Spoiler place the Attachment text inside spoiler tag for example like mine.
And that is how you place a Image inside a spoiler. If this is not what you where asking or if it did not make any sense then please tell me and I will respond to that.