Sections in TOEFL depend upon type of TOEFL test you take. Sections for IBT, CBT and PBT vary from each other.

Sections for IBT
Reading - 39 que - 60 Min
Listening - 34 que - 50 min
Speaking - 6 que - 20 min
Writing - 2 que - 55 min

Sections for CBT
Listening Comprehensive: 40-60 min
Structure: 12-20 min
Reading Comprehension and Vocabulary: 70-90 min
Essay Writing: 30 min

Sections for PBT
Listening: 30-40 min
Structure and Written Expression: 25 min
Reading Comprehension: 55 min
Writing: 30 min

Detail information on TOEFL sections is available here:
http://en.wikipedia.org/wiki/TOEFL#Formats_and_contents

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