Few other things
An e.a. rod license which you can buy online.
Most coarse fishing you also need a day or season ticket for the venue, unless its a free stretch.
If youre going for big fish you need a big net, and also an unhooking mat for carp. Its no good turning up without a net.
A lot of stillwaters insist on barbless hooks now, so it pays to have some in your box.
Use the lightest line you can get away with. Lighter line equals more bites. always use a lighter hooklength than your main line to make breaking out of snags easier and prevent leaving loads of line lying about. 6lb mainline, 4lb hooklength would be ample for chub fishing, 8lb/6lb for barbel in most situations. Maybe 12/10 for carp. I used to use 3lb mainline, 2.5lb hooklength for maggot feeder fishing on the wear but would drop to 2lb mainline 1.5 hooklength for light float work on ponds for roach and skimmers etc. Flouro hooklengths are probably a big plus these days.
I could ramble on and on about feeders, hooks, bait presentation, hook tyers, disgorgers , shotting patterns, floats, octoplus gear etc etc, but thats all for you to find out.
Hope some of this helps anyway bud.