I think team troll should be in the third city instead.
as for the task, you get to different's lab and are told he left for a store to the left of noob town. you go to a small building and inside you see different buying some hamsta food. He apologizes and tells you to meet him in his lab where he gives you and your rival the choice between the three starters. you then set out for ____ town. on your way a dude stops you and asks you if you need a demonstration on how to catch pokemon. either way, he gives you 5 pokeballs and sends you on your way. ___ town is fairly simple, a poke mart and a few houses. in one is a pokecenter like area where you can rest. in another, a woman gives you running shoes.
*note: if possible, later when you defeat team troll's hideout (about halfway through the game) the city will have dirt instead of grass. the people walking around will tell you they're renovating and want to have a big city. they also tell you that some nice men named linus and supermen are paying for it. you have 1 gym to beat afterwards, but then you still have team troll problems, with many grunts saying that soon they would have a new hideout. at the normal point when one defeats the hideouts, professor oak will call(if possible, if not just tell) you that team troll may have a new hideout in ___(second) town. then either
1. oak is snatched by troll grunts and taken away. you return to oak's lab to see if he's ok (if just talking, you simply follow him) and endup at the second town, which has now expanded into a large city. in it's center is a large building that now serves as team troll's hideout. you can't get in, but ratburntro44 gives you the key and tells you where different is. you save him etc etc
2. oak asks you to go to team troll's new hideout in ___(second) town. you go and once there, a grunt pulls off the hamster costume and says it was all a trap. then, you face lots of grunts, basic defeat hideout stuff happens.