JEE

Your expected JEE Main AIR is about 180125. You have not write about the category and home state you belongs. However if you belongs to Punjab under general category, than keeping the last year of trends in consideration you can get the following.
1. Biotechnology
2. Textile Technology.

Satender, to get admission in YMCA on the basis of JEE Mains percentile is not sufficient, in addition to that you should also have equally good marks in your 12th standard, because of the tough competition right now in the market. So I hope you will get good marks in your 12th so that you can get admission in this college.

Sorry with the above result you cann't get into CSE or ECE branch in sastra.

The expected JEE Main AIR of your son is about 127297. Please write about home state and category you belongs for better response. However keeping the last year of trends in consideration, NITs and CFTIs are difficult to get through other state quota if belongs to general category. So please seek the admission in state engineering colleges where you belongs.

It's highly impossible to get a seat of CSE in Thanjavur branch, based on your score. If you are very particular in that you have one opportunity join in any branch you got in the counselling then in the first year get CGPA above 9 you can avail your CSE seat from your 2 and onwards.

Its difficult to get SSN College of Engineering. The major admission in SSN are based on merit of qualifying exam (12th marks). Total seats 65% are filled up through single window counselling. The seats offered by SSN are filled up within the first few days of counselling with significant high cut-off marks. The remaining 35% seats of the management quota are also offered through merit. 25 seats are earmarked for students who excel in both their academics and sports and 25 for toppers of Government rural schools of Tamil Nadu.

MNIT, Jaipur i. e in Malviya Nagar.

Rank : 9501 -10000
mark :175 - 176
rank : 10001 - 20000
mark : 165 - 174
rank : 20001 35000
mark : 152 164
mark : 35001 - 50000
rank :140 - 151
mark :50001 75000
rank :130 - 139
mark :75001 - 98000
rank :125 129
mark : 98001 - 118000
rank : 117 - 124.

Yes, sure you can get the CS branch in IIIT Hyderabad.