The TOEFL iBT® test has 4 sections: Reading, Listening, Speaking, and Writing. During the test, you'll perform tasks that combine these 4 English communication skills, such as:
read, listen and then speak in response to a question
listen and then speak in response to a question
read, listen and then write in response to a question
The total test takes about 3 hours to complete, but you should plan for 3½ hours, allowing 30 minutes for check in.
This quick video about the structure of the TOEFL iBT® test will help you understand what to expect on the test.