As per your concern I will tell you information of TOEFL IBT and PBT test so that you can go through it.

Here telling you details of TOEFL IBT and PBT test

TOEFL IBT
This test, delivered via the Internet which help you to measures your ability to use and understand English at the university level.

Test is for?
The average English skill level ranges between Intermediate and Advanced.
Students planning to study at a higher education institution
English-language learning program admissions and exit
Scholarship and certification candidates
English-language learners who want to track their progress
Students and workers applying for visas

Location and test date
The TOEFL test has more test dates (over 50 per year) and locations than any other English-language test in the world.

You can retake the test as many times as you wish, but you cannot take it more than once in a 12-day period.

If you already have a test appointment, you cannot register for another test date that is within 12 days of your existing appointment.

TOEFL PBT
The TOEFL® PBT test, administered in a paper-delivered format, is currently offered only in locations where testing via the Internet is not available.

About TWE test part of PBT
The TWE® test is a 30-minute writing test required of everyone who takes the TOEFL PBT test. You will write a short essay on one topic from your TWE test book to show your ability to:

Generate and organize ideas
Support ideas in writing with examples or evidence
Use standard written english formats

Cost
The cost of the TOEFL PBT test is US$170.

Address:-
ETS
ETS Corporate Headquarters
660 Rosedale Road
Princeton, NJ 08541 USA

Phone:-
1-609-921-9000