It would be almost impossible to find somebody who knows any English.
Actual train station is located 30min from the town.
There are some busses which run to Bialystok, Bielsk Podlaski, etc.
There is no taxi service...
Kleszcze is located in north-east part of Poland (about 80km from Bialystok). You could end up there on your way to Grabarka.
There is not so much to do.
The only attractions are: beautiful Orthodox Church which unfortunately is not open every day. On the other side of the town is Catholic Church. The train station is something to be seen. It was build during tsar time.
There is a little restaurant just by the main road (I belive there is also a little Motel by the raod as well). Area is very peaceful.
Don't mix it with Kruzewniki!!!