OP please don’t buy furniture or accessories. Contact a local home stager and ask about their packages. We offer very basic packaged (advice basically), all the way up to renting furniture and repainting for you. There will be someone out there to suit your needs. Don’t waste money when you can rent things and have someone else deal with it all.
Please please give this a go, don't buy half of Dunelm (honestly there are better shops anyway) get the house nicely painted with some new carpets and then back on the market at a reduced price. Absolutely add some plants outside - big planters so they soften that massive swathe of paving - it will make a huge difference as at the moment it doesn't look welcoming. You love that you can park three cars... I'd love some greenery so that when I looked out my living room window I saw some bushes, acers, some prettiness. Inside put flowers in vases, a few plants, get the back garden looking like you love it out there and bob's your uncle.
Don't paint any walls purple. I love dark colours and my home is an ode to hague blue, inchyra blue and pelt. BUT, I know that when I sell it, I will probably be painting everywhere white.
Someone will come to your house, see the potential and buy it. But it's always, always about the price. My own house had been on the market for a year at £40 grand more than I got it for. It was just out of my price range to even think about an offer. The day it was reduced I visited, made an offer pretty much on the spot and had moved in 4 weeks later.
I'd def avoid magnolia - we moved abroad for a while and the rental agency insisted on magnolia (it was mostly white FFS) and it seemed to suck the joy out of the house. And don't put coving up - I danced when our artex ceilings and coving got removed.
I think a stager is actually a good idea - you said you don't like extra home furnishings and better to have an expert eye than buy stuff that isn't to your taste anyway. Sounds like they aren't too expensive anyway.
Good luck - here's to a happy new home for you in the near future.