My try for the last part:
6
We are going to Saxon Switzerland by boat.
İsviçreyinin sakson sandalda gidiyoruz
İsviçre’deki Sakson’a gemiyle gidiyoruz.
(ile is used for vehicles. Dative case is used for going somewhere, Henry explained the use of ‘ above.)
7
Dresden is one of the most interesting and one of the nicest towns.
Dresden en ilginç ve en bir iyi şehir için iyi şehirlerde
Dresden, en ilginç ve en güzel şehirlerden biri.
(Look at the structure –lerden biri ’one of the –s’.)
8
Come back next year.
gelecek yılda geri gelecksin
Gelecek yıl geri gel.
(As a thumb rule, you can drop case endings from time expressions like this. Remember separately those which need case endings. Imperative sg 2nd = verb root.)
9
A visit to the zoo would be nice.
Bir hayvanat bahçesi ziyaretin iyi mi?
Hayvanat bahçesi ziyaret iyi olur.
(There is talk about a definite place > no bir. And it’s not a question, dear.)
10
Dresden has got nice surroundings.
İyi ortam Dresdende var
Dresden’in güzel bir çevresi var.
(nifrtity, go study possessive construction X+ gen - Y+ possessive suffix - var/yok. It is not difficult and you need it a lot.)
