I hv a doubt......i case if my IELTS score is 7 (assumption), will i get addmission in University of Technology, Sydney, Australia ???

The minimum required score for admission into Undergrad programmes is 6.5 for University of Sydney, Australia. Having a score of 7 doesn't guarantee you an admit, because apart from IELTS score, the university will also take into consideration other things such as your performance in High school, or your Graduate programme. And also your participation in extra - curricular activities.
And about the fee structure, you should mention the course you're looking to study, the fee structure depends on the course.