If your opponent is not ranged, you can win 1v1 99% of times.

Example of how to do it in this video:
Play Video
After you establish your dominance, try to freeze lane and punish your enemy whenever he comes to farm. Missing a minion and not letting your enemy farm a minion is usually a positive trade, as TK core build is cheap, and this might tilt your enemy.

You have some options on mid/late game. You can use your ult to compensate the lack of TP to go back to lane (ult from base, so you recover the mana). After you get your frozen mallet, if the enemy is past half of the lane, you can activate ghost, Q him, and just AA him to death. If you ended up losing lane, you can try a gank on bot lane, ulting to go behind enemy lines if they are advanced.

I'll add a few videos of examples of how to fight, and how to play mid/late game. Guide still being built