what ranks in AIEEE are required to get admission in IIT's and also in which engineering courses is IIT Hyderebad expert and about how many engineering courses are available in it?

AIEEE rank are irrelevant as far as IITs are concerned as IIT admission is solely done on the basis of IIT-JEE. IIT Hyderabad has 6 engineering streams - Computer, electrical, mechanical, civil, chemical, engg science. However it is advised not to join any new iit as they immensely lack in infrastructure. Rather prefer the old IITs or IT-BHU (which shall soon become IIT-BHU once the bill is cleared in Rajya Sabha).