League-of-legends – Leavebuster while playing with bots only

No, at the moment you can only use the ones you mentioned. The only thing you can do is choose wisely between them. RIOT really tries to encourage people to play against other people and not vs AI.

No you can't. It is a part of bot AI and they choose on their own where to go.

edit: this answer is out of date and as gbn stated in his answer, apparently the lane decision works a little different now: "Custom game bots now adjust to players' initial laning decisions before the first minion wave spawns". For more details please check his answer.

On the other side, you won't gain much by playing on your own against bots (except if you want to practise jungling - this way no-one will touch you). You will only learn basics about the skill set of the champion you're playing and you will learn bot AI patterns which won't help you when you start playing against real players. You will have to apply different tactics against humans and learn when to activate champion skills based on how humans react. If you really want to play against bots, why not play Coop vs. AI?