TOEFL

It is absolutely important to give such exams. It is to determine your English communication skills. It is important because you will have to live in a different country so you must be fluent in English and these tests check your ability.

Yes, you are eligible for scholarship, but universities will assess your profile and then they will give you a scholarship.

Only if you get a very good SAT score will you be able to get a good college. Plus, you must have excellent extracurricular activities, outstanding essays and recommendation letters. No doubt your TOEFL scores must also be impressive.

I don't know, but I can suggest you some very good books:
Wren Martin Grammer
Rogets Thesaurus
Rosenblum
Vocabulary
Norman Lewis
You have to read this book in addition to coaching centre.
TIME is a good coaching centre.

TOEFL is a test for English language proficiency to study abroad. Your 12th marks are not important for taking the test. Having poor marks in 12th and good score in TOEFL won't be of too much help, you may receive if the university likes your profile and also TOEFL has its own scholarship schemes. Check TOEFL India scholarship.

The best books for improving English:
- Wren & Martin Grammar
- Roget's Thesaurus
- increase vocabulary Rosenblum
- Norman Lewis books

If you take one, it will be enough. This exam is to prove your English proficiency to study abroad. IELTS is written directly by hand and TOEFL is an online exam. Whatever is convenient for, you can do it. Any of them is enough for you to study abroad.

You take some coaching and write IELTS exam. You can apply to university with your PUC mark sheet and IELTS mark sheet. You can register on Shiksha itself if you want to study in Canada.

You can prepare using good books-
Norman Lewis
Rosenblum
Roget's Thesaurus
Wren & Martin English Grammar
Also, solve previous years' papers.

Hi,
It's difficult to say. If you don't have strong academics, but just a good TOEFL score it won't increase chances for you to get scholarships. You must excel as an all rounder.