There are four different tests which get the “TOEFL” exams. Two of them are very unimportant.

TOEFL test is stands for Test of English as a Foreign Language is a standardized test to measure the English language ability of non-native speakers wishing to enroll in English-speaking universities.

TOEFL is one of the two major English-language tests in the world, the other being the IELTS.

TOEFL types exams:

TOEFL ITP
TOEFL CBT
TOEFL IBT
TOEFL PBT
The Main Point

TOEFL is an Internet-based or paper-based standardized test.

Duration
Internet-based test (iBT): 3 hours 10 minutes to 4 hours 20 minutes (excluding 10-minute break in-between).
Paper-based test (PBT): 2 hours 20 minutes to 2 hours 30 minutes.

Score / grade range
iBT:
0 to 30 (in 1 point increments) on each of the 4 sections
So total of 0 to 120

PBT:
Listening: 31 to 68,
Structure: 31 to 69,
Reading: 31 to 67.
Total of 310 to 677.
Writing (separate): 0 to 6. (All in 1 point increments.)

Score / grade validity 2 years