Toilet help please!

[FourForYouGlenCoco]

Apologies in advance for v boring and slightly grim post, but: we moved house in May. Old owners left everything utterly filthy. Stuff mostly clean & sorted now but the toilet really bothers me: there's this ring of manky gunk round the edge. How do I get it off?!
Have tried:
Vinegar/vinegar+ bicarb
Lime scale remover
Toilet cleaner
Neat bleach

Hoping someone has a magic solution for me!

Remove as much of the water as you can then pour a bottle of Coke into the pan. Proper Coke, not Diet. Leave overnight then clean as normal.

Shut off the water inlet, flush, remove as much water as you can from the pot and then use spirit of spirits from B&Q or homebase and clean up. Be careful with the stuff and follow the instructions on the bottle.

Oh and just because: this is what it looked like when we moved in! So it's a lot better, but still not perfect

Ooh, xpost. Thanks both!

Marigolds and a good scrub with a rough sponge?

Marigolds and a brillo pad

Ooh coss post. Great minds think alike Dame.

Buy a new toilet!

Stet advent tablets got mine clean again! Plus lots of neat bleach left overnight with no water in.

Plumber...new toilet!
We moved in to something like this - I thought I'd conquered it but it would keep returning so put a temp loo in until the bathroom was done about a year later

I second black bottle harpic, that stuff is fucking brutal

east don't get me started...I won't even show you the rest of the house. So disgusting. Couldn't believe anyone could actually live like it!
Thank you so much for all your suggestions - think I'll get my hands on the Harpic, follow up with the marigolds & Brillo pad and see how we get on.

Hell would freeze over before I left a house like that. Unless of course there was a good reason for it. Anyway also used harpic and worked very well in an elderly relations house. Don't get me wrong house was very clean but a really bad limescale problem and harpic worked just using it on my weekly visit

Harpic, rubber gloves and a scourer has gone a long way to solving the problem! Picture not brilliant but it's nearly gone - there is a tiny bit round the edges still. I'll persevere with the Harpic and give another scrub if necessary when I get a chance. Should have posted here ages ago! Thank you experts

Wow well done !