There are two parts to the claim.
The compensation for your injuries is called general damages. Each injury has a value and this value is dependant on whether it is minor or major.
There are then what is called special damages, and this takes into account your loss of earnings, out of pocket expenses, damaged property and so on.
The two are then added together and an amount is arrived at, although this is a very simplistic explanation, your solicitor will in due course prepare what is called a schedule of damages, and this will include everything mentioned and more beside as you also get a payment for pain and suffering as well as the actual injuries themselves.
It is impossible to provide an estimation of the amount you are likely to receive as no two cases are the same, but don't worry about asking your solicitor, he/she will be (or should be) happy to tell you the sort of value they will be seeking from the other side.