You don't need to upload, like Google crawls and index images, based on alt="description", image filename, and if you don't want for your picture to gain traffic for your site try to paint it with water mark or iframe breaker script as well.
Hi, Just upload a image to facebook or your website and make sure you use alt-tags with your keywords, that way when a user searches for a keyword related to the image keywords you used for your alt tags , there are better chances for your image to be displayed in google images for that keyword.
You don't upload to Google Images. The spider for Google Images crawls your page and indexes any images displayed on it.
You don't upload to Google Images, you just let your site be crawled by the search engines, and whatever images it finds it puts in Google Images
I am not clear about your question. If i am right of that thread then go to setting option and see change profile pic.