Well if you are tyring to find out the fee to be charged by a lawyer then this query cant be answered here. Every lawyer has his own set up and criteria for charging fee. You may approach your local lawyer for detailed discussion on this.
As far as other kind of costs like Court Fee etc. are concerned then those are as according to the fee strcuture provided by the Concerned State.
Do it yourself, don't have to engage advocate for the same in Family Court, rather legal representation under section 13 of the Family Court Act is not matter of right but discretion of the court to allow for limited purposes.