This will give you a rough idea of how much things cost (based on the average that people spent last year).  I haven't included engagement costs, wedding rings or honeymoon.

Wedding dress            1000

Brides accessories         500

Bridesmaids                  200

Grooms outfit               250

Make up, hair

skincare                      200

Brides flowers               100

Bridesmaids flowers        120

Venue/

church flowers              300

Transport                     350

Church/

 Registrar fees              350

Stationery                    250

Photography                1000

Video                           600

Reception venue           2000

Catering                      3000

Drinks                         1250

Cake                            250

Favours                        150

Music/Entertainment        500

Going away outfit            100

Thank you gifts               200