ignore most of the above advice, you don't need climbing (rock) training. it is a long, long high walk. You could technically walk the whole way with your hands in your pockets, but don't under estimate the challenge, most people fail because of fitness and/or failing a acclimatise properly.
you will need to a aerobically fit as possible, this will help your recovery from day to day and aid your acclimatization as you gain height.
Dont over do it in the last week, wind down and eat heathly. The last you need on the summit day is a virus to fit off, so look after yourself.
The days are quite warm, so you wont need much specialist gear then. nights are cooler, so a good warm jacket for pottering about and a cosy sleeping bag.
Some people using walking poles, smallish comfortable rucksac, no more than 40 litres for during the day. suncream, camera, chapstick, water bottle or drinking system, set of cards for evenings. Some alcohol gel is useful for keeping your hands cleaning, before eating and after the loo. Some companies do provide water to wash your hands/face, but this is only clean if your 1st !!