Helsinki City Theatre is the other one of twe two biggest theatres in Helsinki. The repertoire includes Finnish and foreign classics, new Finnish plays, musicals and childrens theatre. Check out what´s currently being played from here: http://www.hkt.fi/
The Helsinki City Theatre was founded in 1965. The plays are normally in Finnish.
You can take either metro or trams 1, 3B, 6 or 9to ”Hakaniemi” and walk from there. It is some 400m to walk from Hakaniemi.
Ticket prices for adults are usually between 31€ and 51€. You can buy the tickets from any Lippupiste office (All R-Kiosks for example) or www.lippu.fi .