hi,
veileds are pretty cheap in the UK, you can usually get them from between £40 - £70 from pet shops. you can pick them up cheaper on the UK reptile forum, or even the classified section on here but theres not many uk.
heres the basics of what you should get:
a Zoo Med Repti-Sun 5.0 uvb linear bulb to provide uvb
a lamp holder and reflector with a normal bulb of around 40 - 60 watts for basking
a digital thermometer to measure temperatures
a hygrometer to measure humidity
calcium dust without d3 to use most days on the feeders
calcium dust with d3 to use twice a month
a reptile multi vitamin to use twice a month
a dripper to supply drinking water
a spray gun to mist the cage and provide humidity
a good selection of suitable live plants, fake plants, branches, vines and dowels.
a place to keep your feeders, a good range of feeders and plenty of veggies to gutload them.
i wrote this topic in this link to describe some of the things to consider as a newbie to the hobby which i think may be of use to you.
https://www.chameleonforums.com/observations-noob-51297/