Hello there my fellow LoL members. This is my first guide and wanted to see what you guys think of it. A lot of the items discussed in this are basically used based off of my experience, but if you have better suggestions for AS/AD Teemo, your comments would be greatly appreciated. Keep in mind that this guide is a work in progress, so I will use your comments to upgrade this guide. :)

At the beginning of the game, I prefer to put my first skill point on blinding dart, simply because you sometimes go against other champions who want to kill you right off the start. Blinding them keeps them from hurting you and giving you some time to get away. When you hit level 2, place a skill point on toxic shot that way your hits become poisonous. Then on level 3, put one skill on move quick. Once you hit level 4, your first goal is to max out toxic shot because it will allow your poison to affect enemies with more damage over time. However, every time you are given the chance to set a point on noxious trap, do it because the traps are key to victory for your team. Placing them in bushes and spots where you could get ganked sets off a warning that alerts your team that enemy champion(s) are ready to ambush you. Once toxic shot is maxed out, begin maxing out move quick while also setting a point on noxious trap whenever you get the chance. Blinding dart should be maxed out last simply because of how much mana it wastes if you were to max it out earlier. Its better to waste your mana on setting traps rather than using it to try and kill champions. Killing champions comes once your build is strong.

Obviously, the key to victory is to have the right items. The items I have described above (based off of experience) are great to use. The reason I have chosen those items is because it creates a nice balance between attack speed and attack damage. Not only that, you have a pinch of ability power to go along with it which gives you a great all-around build.
Being able to shoot quickly and damage them considerably can be a great advantage, especially in situations where you and your team push into the enemy base and find yourselves facing the whole enemy team. Lets say there are no minions around, but you and your team and going 5v5 against the other team. By using Runaan's Hurricane, you give your team the advantage because you can shoot AND poison three enemy champions at the same time.