Colleges in Vellore

I don't think they have categorized the hostels based on seniority.
Refer to the URL below, you will get the complete idea about hostel blocks and rooms available there.
A-4AC, 4NAC, 2NAC and 6NAC
B-3AC and 3NAC
C-2NAC and 4NAC
D-1AC and 1NAC
D Annex-3AC, 3NAC, 4AC, 4NAC
E-2AC and 2NAC
F-2AC, 2NAC, 6AC, 6NAC
G-1AC, 1NAC, 4AC, 4NAC
H and J-1AC, 1NAC and 3NAC, 6NAC (new)
K-4AC, 4NAC, 6AC and 6NAC

No, you can't. Lateral entry in not there in VIT, Vellore.

Yes, there are good chances with above 90%.

Yes, it is one of the best colleges for CSE.

VIT-Vellore does not offer lateral entry admissions.

If you've given VITEEE then first clear your maths exam and then take admission.

VIT hands down. Among the best Pvt. Institutes in india.

It's around 1.5-2 lacs for a year.

Yes, there is a good chance.