1. To hide the first section, you need to edit the workflow for your profile type and in the header field, leave the description as empty,
http://take.ms/VrjAGu
2. The language string that you are searching for is located under /language/en-GB/en-GB.com_easysocial.ini
PLG_FIELDS_AVATAR_CROP_PHOTO="Select a section of your photo to crop and create your avatar."