Well this question could have millions of different answers, but here goes.
-Class One Medical £400.00 (a must have before you start)
-150 hours including PPL £15,000 approx.
- ATPL Ground School Full Time £2 - 3000
- CAA Theory Exam Fee £718
- CPL Flying Module £4500 approx.
- Flight Test Fees for CPL £150
Now you have your cpl which you can add the following.
-Instructor Rating £4000 approx.
-Instrument Rating £9000 - 13000
This figures are just a very rough guide as better deals can be found depending on which schools or countries you fly in.