Use Locale to add the languages you need. For this, go to Administration > Configuration > Regional > Languages and add any language(s) you require.
Content Type Settings
In order to use Translation Management on a Content Type, you must make it language aware. Go to the settings of your content type, choose the Publishing Options and set the Multiligual Support to 'Enabled, with translation'.
A good starting point for testing is to use this setting on the standard content type 'Basic Page'.
To folow this tutorial it is helpful to install the Microsoft Translator. Install ad activate this module and a new translator will show up in the list.
To use it you need to obtain a client ID from Microsoft. This is free as long as you do not send more than 2'000'000 characters to MS for translation per month. You can get such a key from Microsoft Azure Marketplace.
Once you have registered, go to Administration > Configuration > Regional and language > Translation Management > Translators and choose to edit the Microsoft Translator. Add your 'Microsoft Client ID' and 'Microsoft Client Secret' into the appropriate field. Save the Translator.
you are now ready to create your first Translation Job.