Is 180 good mark to get into NIT Warangal????....what will be the estimated cut off for Jee Advanced to get into an prestigious IIT???

I don't think so because NIT Warangal is the topmost NITs and to get a branch like cse/it/ece you have to score a minimum of 240 marks in jee mains...but you can prepare from now and try for it.
Here i am providing you the link from which you can check previous years cutoff of jee advanced:
https://www.google.co.in/amp/s/engineering.careers360.com/articles/jee-advanced-cutoff%3famp
All the best!!:)

That is a lot of data to be compressed in just a few lines. So I will suggest some articles which have given the details. for instance for all IITs, pls check this - https://engineering.careers360.com/articles/jee-advanced-cutoff

For all NITs, check this https://engineering.careers360.com/articles/jee-main-cutoff

NIT Warangal is very sought out. I dont think 180 will be enough. It is well known and many students prefer it to newer IITs. I wont be able to specify marks here simply because each year this varies. However anything above 250 should get you a chance.

However you could just check the NIT Warangal cutoff here

https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-warangal