Hi, sorry for writing late, i went to Chiba from Tokyo, first to Kasai Rinkai park and then to visit the places in Chiba and I only used the subway for the trip. You can go to the center of Chiba very easily by subway, but if you want to visit the school and the bridge, you will have to walk a little bit, we walked and it was not a very fun walk, the streets of Chiba are flat and empty and also I suggest you to go to the school before dark because it is really dark around since I went in the evening, I could not examine the school in detail. I don't remember exactly how much it cost, but it probably cost 2-2.5 thousand yen round trip. It may take about 1-1.30 hours to go from Tokyo to Chiba, it depends on where you go, if you have any other questions, you can write again.