Just a quick comment. For years I trolled without line counter reels or color coded lines. Just count the "passes" on your level wind reel. First figure out how much line comes off with each pass of the guide from left to right (or right to left). Say it's 5 feet. Then when letting your lure out, count passes. Across and back is 10 feet. Pretty simple. That assumes you use level wind reels. If you use spinning, it's bit more troublesome, but you can count handle rotations.

Last comment, it's not rocket science. You can just let it back "about as far as you can throw a rock" and troll a while. If you don't get a hit, let it out more, or bring it in some. Pay attention and pretty soon you'll have them dialed in.
Hope that helps,
Bordy