- i really need some step by step for appending the link

hi - i really need some step by step for appending the link url to original source using excerpt.

sample url http://morningside-alliance.org/brownfield-action-course-prepares-students-for-environmental-science-careers/

does this only work for new posts (when fee has new post)

how to i make it such that i only see 1 (first) photo image?

i much prefer to how url as the_meta but do not know how to convert url to a hyperlink.

thanks