Yes, there are buses from Turku to Pori, the best one for you, Jutti, would be one that leaves from Turku bus station 10:30 and it's in Pori 12:45. From the airport you can go to the centre of Turku with bus number 1. It goes 3 times/hour and it's 22mins trip. Here's how to walk from Kauppatori (that's where the bus 1 leaves you) to the bus station in Turku: Pass the church, then turn right to Mariankatu, then turn left to Aninkaistenkatu. The bus station is Aninkaistenkatu 20, it's at the end of the street on the left side.
If you want to see the map/timetables of Turku, this is the address: www.turku.fi. (also in English).

Geli, do you remember when Anna will come here? on Tuesday on Wednesday? I have a bad memory.

Now I'm in a hurry, but see you soon!