I recommend you buy only the tools you will need to build your workbench for now then add as needed. Also watch YouTube videos to learn techniques that work for you then practice, watch again try again - rinse and repeat
Router - I would buy a trim router not a bench router at this stage and the best value is a Katsu and I would buy the cordless for versatility but the 240v is a lot cheaper and just as good.
https://www.aimtools.co.uk/collecti...collets-1-4-and-3-8-battery-4-0ah-and-chargerMallet This is excellent as a chisel mallet - use the white end
https://www.amazon.co.uk/dp/B0086F9AHU/ref=pe_27063361_485629781_TE_item
Plane I would buy a good 2nd hand Stanley No 4 Smoother from eBay but there is a risk. I bought one and despite it looking fine the cutting iron in it was the wrong size and couldn't be retracted. There are a lot of plane restorers on eBay, some are good some not so much. Avoid any with heavy rust or pitting or any that look like they've been overly sanded down and check the tote (handle) and knob are in good order. If in doubt post the advert on here and ask for opinions.
Chisels Very personal choice this - ask here and get at least dozen different answers, I'd avoid 2nd hand as it's risky and could take you a long time to restore (unless this appeals of course). As you will get a lot of use from a relatively cheap set, bearing in mind you might find they blunt faster than dearer ones (which you can always upgrade later). These ones look ok
https://www.amazon.co.uk/Irwin-Marp...hvlocphy=&hvtargid=pla-4584482456222489&psc=1Sharpening Again a very personal choose and please don't ask for opinions on this forum as you will really regret it - just do a search on the forum to see what I mean. I use 3 Vaunt diamond stones from ITS 200x75 Coarse, Medium and Extra Fine. Watch how they hand sharpen and practice on an old chisel if you have one - you won't regret it, a jig is handy for grinding, but learn to hone by hand, you won't regret it.
https://its.co.uk/hand-tools/more-hand-tools/sharpening-tools/I use cheap glass cleaner to lubricate them but watch this useful video
She refers to Paul Sellers video which is also very good here
Sandpaper Sounds a no brainer but quality sandpaper will save you a lot of time. I use this and it is excellent stuff, lasts ages and doesn't clog
https://www.toolstation.com/mirka-mirox-sanding-sheets-230mm-x-280mm/p84980Combi Square These are recommended just make sure it's metric or both if you're still working in imperial. Some prefer Stanley Rabone but they are getting pricey now. If you need a birthday present ask for a Starrett combi!
https://www.amazon.co.uk/Bahco-CS30...EuMDQifQ==&sprefix=stanley+rab,aps,93&sr=8-17Try Square These are superb value for money
https://www.amazon.co.uk/Starrett-K...==&sprefix=starrett+try+square,aps,208&sr=8-7Marking Gauge - Get a single gauge and a 2-pin mortise gauge as they will save you a lot of time marking out your bench leg joints. Also buy one of these as they are easier to use than a craft knife
https://www.amazon.co.uk/Stanley-Fo...ix=stanley+folding+pocket+knife,aps,75&sr=8-2Pencils Seems simple but I would buy a pack of these Staedlers as they sharpen easily to a good point
https://www.amazon.co.uk/Staedtler-...jIuNzEifQ==&sprefix=stadler+2b+,aps,89&sr=8-5Sharpener this is excellent
https://www.amazon.co.uk/Pencil-Sha...2&sr=1-1-1890b328-3a40-4864-baa0-a8eddba1bf6aEraser comes in handy for rubbing out marking mistakes on wood
https://www.amazon.co.uk/Staedtler-...ifQ==&sprefix=staedtler+eraser,aps,145&sr=8-6Combi Drill - Again a personal choice and depends on your budget, there are lots available
Saw - You will need a carcass rip saw and a crosscut for tenons, I bought these veritas saws and they are excellent
https://www.axminstertools.com/instantsearch/result?q=veritas sawClamps - You will need quite a few. Think through what sizes you are likely to need for your bench, watch what YouTubers use sizewise but beware some are very expensive. One handed clamps are useful for light clamping and are cheap enough from Aldi, Lidl or similar. F Clamps are good and Screwfix sell a good range that I have
https://www.screwfix.com/c/tools/cl...anagedredirect-_-handtools-_-magnussonsfclampI recommend these for medium clamping force but they need strengthening with wood inserts to be really useful
https://www.rutlands.com/sp+workhol...ash-clamps-1500mm-pack-of-6-rutlands®+r3008x6For strong and long clamping I have these which are excellent
https://www.axminstertools.com/axminster-trade-clamps-sash-clamp-1-370mm-505580Rulers Get a 150mm, 300mm and 1000mm
https://www.banggood.com/150-1200mm...d=31986729&sc_lid=105229698&sc_uid=Yl0GhAUFGs
I think that should get you started I hope it helps!