Buy a copy of Total Recall by Pippa Mattinson and start whistle training from the getgo. Both of my Lurchers had excellent recall having been trained to the whistle.
Not read this one myself, but have heard that Diary of a Rescue Lurcher is a fun and informative read for prospective Lurcher pup owners as well.
We got our last rescue Lurcher at 10 weeks and one of the most notable things was his total inability to control his legs, speed or brakes! Every single member of the family was ‘Lurchered’ (when they knock you over by either failing to break quick enough or having crap spatial awareness when attempting a fly-past) within the first two months.
Soft toys are a generally huge hit, especially if they also have dangly legs or flappy wings to flop about when shaken. However, be warned that there will be lots of evisceration and the necessity for a dog-toy hospital, where regular surgery will be required on a regular basis. Fwiw, the flat soft toys with no stuffing are also fun and less messy!
When mine were pups one of their favourite pastimes was shredding cardboard. They used to help us destroy boxes that deliveries came in to fit in the recycling bin and we kept all the inner rolls from cellophane, foil and baking parchment as those are thicker and keep them busy for ages, whilst satisfying the need to chomp something. Also, snuffle mats, treat dispensing balls, kongs, a kong wobbler and licki mats are all good ways to keep them busy and wear them out.
Beds - they like to stretch out and roach (lying upside down with legs all over the shop) so a lovely deep mattress or duvet style bed is usually favoured. BUT you will also need a mountain of fleece blankets and they do love their comfort. Don’t be surprised if they spend more time on your sofa or in your armchair than on their own bed though.
Some people favour martingale collars and you can get some stunning designs (which can lead to collar addiction!) but mine have always had beautiful engraved leather fishtail hound collars from this guy - we have the celtic knot ones and then been walked on a harness. My old boy has had his for 14 years and it’s still beautiful.
Harness of choice for me is the Perfect Fit. Lurchers are a funny shape and with Perfect Fit you can choose individual pieces to build up a bespoke harness, then just replace individual pieces as they grow. (Customer services are great at helping you work out what you need.) My last boy only had the Y front piece replaced once, from when he was a 10 week old puppy, because he had such a narrow chest, despite being almost 30” inches to the shoulders. Whereas he needed the girth and back piece replaced several times. They are also fleece lined, which is a must for Lurchers, who tend towards the delicate Greyhound fragile skin.
Speaking of fragile skin - did I mention the complete inability to control limbs, speed and brakes? Well skin is another issue here. Mine was constantly at the vets being patched up after careening into fences, plant pots, people and on one memorable occasion the back wall of the house! 
Be warned that some come with the built in ‘scream of death’ where they convince you you will find them with a leg hanging off, only to discover someone has accidentally slightly trodden on their toe and they are actually fine. You need to be come adept at the ‘oh you poor baby’ kiss and cuddle and rub which usually does the trick in seconds! 
Best thing about owning Lurchers is that they are either the sweetest most bonkers lunatics or (especially if lots of Saluki in the mix) the most gentle sensitive souls that you could ever meet. Some are a mix of both, although that sounds impossible. The ones I have had and those I’ve med have all been incredibly emotionally intelligent.
Some would say the worst things are things like worksurface/table surfing, but for me that’s part of their charm and I actually didn’t find it difficult to teach mine not to do it. (Although geriatric boy has now forgotten all his training at over 16 years old and regularly attempts to surf the corners of the table he can reach - thank goodness is is no long capable of jumping up onto it to help himself to the dc’s dinner!)
For me, the worst thing would have to be that they don’t live as long as us.