Lots and lots of threads previously about this subject. The answer comes in two parts:
1. How much to get your licence; and
2. How long before I can get a job
The answer to the first would come from any of the local flying schools. The second answer depends on how much time (and therefore ££££££) you can put into finding a job. Not very easy but it is achieveable.
The £70,000 mentioned before is probably not far off the mark if you add up all the costs.
You have been brave to throw the question out to the forum and you will get some scaremongers here and there but stick at it - you will succeed.
But FlyingSquirrel is right - if you want the bucks, go for the airlines (but nowhere near as exciting)