A few quick ideas off the top of my head
Army Bergen £30
Mora knife £10
Set of army mess tins £5
Crusader mug £10 delivered or a cheap insulated mug £1.99
Thermarest clone £15 (Argos)
Army 95 sleeping bag, grade one, £29.50
Tent, small dome, take your pick £35
Cheap poly tarp off eBay to practise with £8 and use the tent until you know what you are doing with a tarp, forget the Hammock this year
Roll of paracord £5
Swedish Army Trangia £10, you can upgrade to a proper stove later
Head torch, Tesco, £3.99
Tesco Cree torch £7
Boots, maybe army type about £20 or trainers
Waterproof jacket, if you don't own an anorak use an army Gortex about £30
Use the clothes you use at home to start you off, jumpers etc
Thats come in around £200 and for that you have shelter, sleep kit, carry kit, cooking kit, so your up and running.
Upgrade as you gain experience and knowledge, try and find others to go camping with, and remember your better off spending £200 on basics and being able to afford to go out camping, than blowing your budget on some expensive bit of kit that has the right 'label' but means you don't have the money to actualy get out and use it.
Have fun