My older cat has had an infection in her eye that we have treated multiple times. It's been over the course of a few years. Now she has pus coming from her vagina. What can we do?

I have a 8 year old female, I noticed a lump on the right side of her face....2 days later she stoped eating then she went missing for 2 days...I found her hiding in the shrubs...When I picked her up she had a very smelly mouth, abscess??...I called the vet as soon as I found her but they couldn't come out due to Easter holidays...She isn't eating or drinking..

29 August swollen paw 4sept draining stinking white fluid from paws with infection ..not eating or drinking or sleeping- vet did dressing gave antibiotic painkiller 5sept dressing changed after 24 hours still stinking a bit .. 6sept dressing removed after 12 hours uncovered for another 12 hours until dressed again was considerably dry during which cat licked it a bit ..cat started eating itself and slept too no more smell from the injury became active 7sept pus developed again ..dressing done , very active, ran away and did a lot of jumping and hanging around with the covered paw which wasn't removed when we got him back 8 sept dressing twice in morning and evening too ..ate a lot 9 sept ate normally, restless ..mewing in stress ..vomitted late night at12 undigested food and at 5-6 in morning 10 sept restless , couldn't mew, ate nothing ,had little water, cat on drip IV , peed a bit , ate little after the drip 11 sept didn't eat, had a bit milk.. cat on drip IV + Subcutaneously due to water deficiency, after which cat struggled to even stand couldn't move at all started breathing heavy Syringed fluid after 1 hour when the cat had a laying posture through side jaw and cat tried swallowing it everytime 12 sept 3am drip again, panted a lot salivating , peed a lot , heavy breathing continued till 9:17am in the morning .. foamed white,vomitted, struggled hard and collapsed. Stiff body. What killed it 😢

We have an outdoor cat that seems Ferel. We have had him for years. I have tried to bring him inside several times and he flips out. He doesn’t understand a litter box and prefers outside. He wandered to our house one day and never left. We recently moved and brought him with. He was attacked by a vicious cat. He has horrible punctures on both sides of his head and ears. Several marks on his neck. He is lethargic, feverish, not drinking, eating wet food. He is trying to urinate frequently with no output. When he was attacked he disappeared for 3 days and I was a mess searching the woods. He finally wandered up the step. He didn’t look that bad but had clearly been through something bad. He was letting me apply animax cream and bacitracin, but now he will not let me apply cream. He seems to be septic. He is my best friend. He is also old and very sick. I can’t bring him inside to care for him he won’t allow it. We can’t afford a vet for this especially being unable to keep him inside. I’m not sure what to do. I have prayed so much but don’t know what to do. The wound is horrific and he keeps scratching it making it bleed. We never saw any cats here until now. I saw the cat on trail cam which is how I figured out it was a cat fight. He keeps coming to our property and eating dead mice from the fire pit. The cat is savage. Our cat doesn’t eat mice or act ferel like that. This cat tried to kill him and I’m afraid that’s going to happen. Has anyone had a cat with sepsis? Can I give him anything for pain? How much is he suffering? If he’s going to die....how long :(