Either way once you have a cpl you hours build a little more to 250 hours and then take an FI course.
Not correct information, I am afraid-
If you would like to go on and end up at the FI stage, you do not necessarily have to do the CPL at all. If you do get a CPL and do the FI course after it, there is no necessity to do a set amount of hours after your CPL.
If you go down the route without the CPL-
You will need to have the PPL with 150 hours PIC under your belt along with the theoretical knowledge for the CPL (i.e the ATPL or CPL exams completed).
Check out LASORS
http://www.caa.co.uk/docs/33/LASORS_07.pdf Section H and you will get all the information you neeed about the nitty gritty of what you need to do the course etc..
You don't necessarily have to have an IR or an IMC either, that is more personal choice.
There are loads of threads about where to do cheap training, where is best etc...just have a good look into it and best of luck with it all