Well, during his years at Hogwarts he continued playing Quidditch, yes. After the Battle of Hogwarts, though, he did not play Quidditch anymore, and he became an Auror.
Madam Hooch at Hogwarts
There are four Quidditch Teams. They are: Gryffindor, Slytherin, Ravenclaw and Hufflepuff.
As usual Hogwarts only this time it rains
Harry plays Quidditch for Gryffindor, which is one of the Hogwarts houses.
Yes, all four of the houses at Hogwarts (Gryffindor, Slytherin, Hufflepuff and Ravenclaw) play Quidditch.
Viktor Krum :)
Hogwarts castle, Hagrids Hut, Save Dobby, Quidditch pitch, The Burrow, Hogwarts Express train.
Harry Potter played for the Gryffindor Quidditch team while he was at Hogwarts.
Four, one for each of the houses: Gryffindor, Ravenclaw, Hufflepuff and Slytherin.