//Target ID to center of screen cause sometimes fps configs move them off the screen
tf_hud_target_id_offset 0
//Show floating health bar
tf_hud_target_id_disable_floating_health 0
paste that into your config
EDIT: Paste it at the bottom so it overrides the commands that are removing your targetid box. Or you could do the cleaner thing and find the commands in your config and change them to 0.