Also, from your query you may not be aware that you apply to Purdue’s College of Engineering, and if you are accepted you will be a FYE (first-year engineering) student; you will not go into a major until your sophomore year.
Here is a link to the Purdue Data Digest, https://www.purdue.edu/datadigest/ ; once there, go to the link for “Applications, Admits, and Matriculations”. It is interactive, so you can input the parameters that most apply to you (for example, you would be “Foreign” under the “Residency” tab). Based on your input, the Data Digest will generate information and create some graphs/charts from which you may be able to make an estimate of your chances for admission. Also, there should be a table at the bottom which gives the admission rates (and yield) for students matriculating in the Fall semesters of the past 10 years; you will see that the acceptance rates have been broadly trending down for undergraduate engineering applicants since 2009, although there was an upward spike for last year. As recently noted elsewhere on the Purdue forum, the university underestimated its yield last year, and had about 500 more admits than it planned for; so there is some speculation that there may be fewer admits for this coming admissions cycle to compensate for that.
You can also look at Purdue’s Common Data Set, here, https://www.purdue.edu/oirae/resources.html. Part C7 tells you what admissions factors Purdue considers to be “very important,” “important,” “considered,” and “not considered”; Part C9 of the CDS gives the median 50% for both SAT and ACT scores, as well as the percentage of the entering first-year class falling within certain ranges of SAT and ACT scores. As you can see from the CDS, Purdue views standardized test scores, GPA, and high school course rigor as “very important” admissions factors, and ECs, personal qualities, LORs, and application essay(s) as “important” admissions factors.
Assuming that you are admitted to Purdue’s COE with your current statistics, your chances of getting merit aid are about zero.