In this context, "target language
" is the language you aim to present in a lesson. It can also mean the language that something is (going to be) translated into or the language that a language learner is learning.
You seem to be doing a TEFL course and covering the teaching of functional language (eg giving directions); and the "target language" required is examples of the functional language. If that is the case, your examples seem fine and adequate, with a few corrections:
How to get to + building name/place/street
How do I/does one get to + building name/place/street?
The cinema is
beside the post office, on the left.
How to get from the playground to the museum, please?
How do I/does one get from the playground to the museum, please?
It is on **** Street. Walk down *** S
treet to **** S
treet. Turn right and the
museum is next to the Times Bookshop.