Then what should I prefer IT with TFW in GL bajaj or try some other institutes like KIET with ECE. I'm getting ECE in KIET. What should I do now??

Choose which one will be good for you. If you are getting ECE with TFW then you can go for it. Else choose for IT with TFW else for CSE with out TFW.
Try to Know yourself what you want to study. Technical or core branch then think you are eligible for TFW or not. If you are eligible for it apply for it. Career is your so decision should be yours. 4 years will be waste if you repent later for studying in  a branch you are not interested. So think which will be suitable for you. All the branches are good and have high scope.

Thank you so much! It really helped me alot. I'm now clear I have always an intrest in CS and IT sectors So I will go for CS or IT no matter I get TFW or not.

Good. It's a good decision. I am also a CSE student in my final year. Being an experienced person, I will say prepare for apptitude, logical reasoning and English from now. Just get perfect in that. The most important is coding skills. Get your best in Java or C++ if you can do both then that will be also good.
If you have any doubt you can ask me.

Yes for sure. I've completed studies of C, C++ and JAVA too during my 12th and I'm good at them all acvording to 12th level. Coding is my favorite part of study. From now I'll focus more on my aptitude and logical part. And I'll give my best!