VITEEE

For architecture you have to give NATA. To get into VIT you have to score minimum 80 out of 200 and for merit you have to score above 120.

No, they are not a charitable organization. They will charge the full fees.

Get a rank under 3000 to get admission at the main campus of VIT.

Yes. You should clear all the requirements which you would find on the website!
Except that admission is based on VITEEE only!

VITEEE is compulsory for engineering aspirants who seek admission in VIT. However, there is no procedure to get direct admission in the second year. All the students selected through VIT Engineering Entrance Exam will be admitted to First Year through Centralized Counselling procedure. Regards.

Hello Bhavya,
These two are good institutions indeed. However, if you want to apply in some more colleges, then Manipal University, SRM or Symbiosis University are also equally good. You can think of these also.

The best is under 5000 but for entry that is under 25000.