where do i start?
If you want accreditation (and this is extremely advisable, the govt will make counselling/psychotherapy regulated within five years and then you'll have to be) it's a long (and expensive haul). Minimum four years. Find out which model appeals to you (there are loads, from psychoanalysis on the couch, through humanistic right to psychospiritual models and all have their advantages and disadvantages, depends on what 'speaks' to you). Be aware the WPF (as mentioned below) comes from a Christian background, this may or may not put you off, and they are strictly psychodynamic (with roots in freud, although it's come a long way since his day!).
Most courses ask that you do an introductory course first, followed by a foundation followed by a professional training. You need to be seeing clients as a volunteer after the first year. You need to be in your own therapy with an accredited counsellor for the length of your training. You need to be supervised for your client work (you need this in order to clock up hours you need for acreditation). all three of these cost money and time.
sorry to sound discouraging but i'm half way through training and it is really really hard, on many many levels not least of which is going through your own therapy...the group I started with halved by the end of the second year...and this is typical...it really isn't for everyone, and the training will change your life (lots of relationship breakups/life reviews etc too)...
At the end of all this, you can count on a starting salary of around £25-35 per hour, but that is dependent on finding a client base...and this can take years to build up. Counselling jobs are not generally very well paid (£15-25K p.a.) but once you are established (which takes years) the money comes in as you can train to be a supervisor/run training courses yourself/even write books if you're that good: in short this is NOT a career for making loads of money (you will take a while to recoup what you've spent on your training: weekly therapy at £30-40 p.w./supervision at £30-40 every two weeks, although sometimes this is offerred by your placement).
However...it is the most fascinating, rewarding if daunting work I've ever undertaken (apart from being a mother!)...
If you want more advice, feel free to email me via contact another talker.