im in high school at the moment just about to sit my Standard grades and im hoping to take higher physics ,maths,chemistry and geography.But when l leave high school where do l go to start training to become pilot.and what will l need to study at university

Depends.what type of pilot do you want to be? The cheapest, fastest way to be a commercial pilot is the Air Force., unfortunately.

well for the most cost effective training you need to come to the USA.
there are schools that have aviation programs that go along with a degree

l have made many friends here in Denton, Texas, USA - there r many international students who fly here.

http://usflightacademy.com

Whether u r in the US or not, go to the airport & talk to a pilot. talk to instructors.

Ask if the flight school has a ''Discovery Flight'' - it just means that they will put u in an airplane, left seat, the instructor will takeoff & land but they will let u have the airplane when at cruise. They usually cost $50 USD or less.

Good luck.

Actually, joining the Air Force would be the cheapest but not the fastest way to becoming an airline pilot. Once u graduate from UPT in the Air Force u have a 10 year commitment. You r usually in for about 2 years before u graduate so u will be in a total of 12 years before u could get out.
But, it is the cheapest. If u really want to join the Air Force the easiest way to get a pilot slot is to go to the Air Force Academy. The Air Force will pay for ur college & ur pilot training. You can also get ur commercial license through the Air Force.
Getting a private license on ur own is very expensive & time consuming. But if u have the money u can take private lessons.
Keep ur grades up.