I don't understand what you're trying to achieve.
Assuming your taglist contains tags named "List" your code will echo them to the screen. Which tag do you wish to jump to? If you have the tag name in a variable, like tag_i_want_to_jump_to, you can jump to it with something like:
:exec "tag" tag_i_want_to_jump_to
If you want to do something else, please try to tell us SPECIFICALLY what you are trying to do, what you tried, what you expected to happen, and what happened instead.