Anna University

For Anna University, you need to apply for TNEA and have to score a good rank in the exam to get a seat in Anna University.

You can get it directly from Google with simply typing TANCET application form 2018.

The registration is not open yet.

Hello Vamsi, The tuition fees per year would be around 10k-20k Rupees and you may pay additionally if you require hostels (if you come under government quota). For industrial and other admissions, the fee structure may be a little higher.
The average package for a CSE student would be 6-8 Lacs per annum.

Each institute has its own advantages and disadvantages. Please evaluate the institutes under your consideration from the perspectives of admission criteria and cut-offs being followed, faculty profile, alumni discussions and placement record. Do not judge by social media and limited impressions of few resources. Please do a comprehensive review.

It involves a lot of procedure which might take a long time to get over. So, changing universities might be a little too hectic or maybe impossible.