Hello Aspirant,

To become an aeronautical engineer you need to, First get about 75 to 80 % marks in pcm then choose a collage if you have good mark go for IIT if not go for private. They will provide scholarship if you have a good mark. The fees for aeronautical and aerospace engineering is about 12 to 14 lakh. Don't worry they will provide high end facilities to train and this aviation industry is going to boom with in next 3 years. 

All the best.