I'm changing themes - and want my custom functions and single post scripts moved.

Basically, Im moving from the WP marketify to the kallyas theme. Its a question and answer site and basically, an answer ( a custom post type) needs to be associated to a particular question (ofcourse)! So I have a script that updates a meta value (license) in the created solution post type in the database with the POST ID of the question ... from under which the form to create the answer is being filled. Then under each question post we have a small script that loops through and finds / lists all answers underneath, using the license - post ID linkage. The modifications were in [login to view URL] and [login to view URL] which need carried over ... Please note Im looking for a stable developer relationship for projects on and off in the long run.