Thank you for your inquiry. Admission is free for short distances to the ticket office. You can also walk outside the museum grounds for free.

bus and train, from big cities such as Tokyo or Osaka take you to the station to the lake area. you may check from the several Japan tourism websites, also in English.

There are several souvenir shops in the museums. I didn't see any DIY workshops for such but you should be able to buy one with your favourite songs.

The bus goes round in a loop and stops at all the different popular tourist attractions. The 1000¥ Is a daily fare. You can hop on and off if you buy the daily ticket. You can buy a 2 days ticket for 1300¥. If you only visit a few attraction you might want to buy single trip fares.