It is important to have a contract between a therapist and a client. This sets out practicalities such as how to contact each other between sessions should it be necessary, payment and emergency contact details etc. A written contract also makes clear the limits of confidentiality. What is said in a therapy session is of course confidential, however in cases where it is believed someone is in direct danger of harm this knowledge needs to be passed on.
The initial session will also cover issues such as what the client wishes to gain from therapy, previous experiences of counselling, and any particular questions or concerns they may have.