SAT

Hi,
Please us know in detail which course you wish to pursue for better advice, however for your reference please remember:
SAT is test which need to be taken by students who wish to pursue undergraduate degree from universities in US.
GRE is test which need to be taken by students who wish to pursue masters in science and engineering fields from universities in US.
As the medium of education in US universities in english so all the international students whose first or native language is not englosh have to take TOEFL test to prove their english language proficiency.
A good score in these tests would surely enhance chance of getting scholarships, however please remember scholarships are competitive and awarded to the most deserving students.
At the graduate level you can get funding in the form of graduate assistantships where you work or research with professors.
In exchange you may get your entire/partial tuition fees waived, and get a monthly stipend to cover your living expenses. Such awards are very competitive.
Universities abroad consider various factors such as previous academics, entrance test scores, work experience, application documents and so on while assessing an application for admission and scholarships; hence, it is important to have a well-rounded outstanding profile.
Feel free to raise more questions. Appreciate by giving it thumbs up or marking as best.
All the Best.