Just a big pot! I got my main pot at a church rumage sale, it's huge. I'm looking for another one of the same or better quality.
Don't need any special tools except with regard to the canning, you should really get a canning pot, they come with wire apparati that you place the jars onto while they are being boiled. Usually 15 minutes suffices. And use Mason jars, other jars may shatter. I had that happen tome last year when I mistook a non mason jar for a mason jar. HUGE MESS, not good.
Anyway, in your other big pot just cut up all your tomatoes (use and get a lot) and place them in the pot with some good oil, add some salt, pepper and whatever other spices you like. I always add garlic and have been roasting it the past few years and last year I added some pepper that I roated and cut up as well.
I use my tomatoes and I buy field tomatoes from one local farm and soft tomatoes from another local farm to add as well.
Even though this is a bit of a separate topic, a also do the same with Apples. There are apple trees that anyone can pick from at my local university so, I get bags of apples from them, I also get some from My grandmothers, and I buy them from local farms. I found a really nice heirloom variety from 1860 at a local farm near my house when I lived in Qualicum last year. It was nice and tarte and was really good in the apple sauce.
I gave some sauce to some friends, their baby loves it, I eat it on a regular basis, put it in my porridge, eat it on it's own, have it with pork, put it in breads and cakes and pastries. Never ending use for apple sauce.