tomato plants are not supposed to be used something about a virus in them.

Freshly fallen leaves have a Carbon to Nitrogen of around 40:1 and Nitrogen levels in the 1 to 2 percent range, so they are at the best for composting at that time.
If you pile them up to "store" them they will start to compost. I have, every year, put shredded leaves on my planting beds as mulches and have seen nothing but benefits from doing that.
If those tomatoes have had one, or more, of the diseases that affect them they should not be cold composted. If the tomatoes are good and healthy there is no reason to not compost them and recover the nutrients those plants removed form the soil they grew in.

Chop or shred those viney things a bit. Your mix sounds good and you may be surprised to learn it can heat up this fall if the mix and moisture is right. If you can get a few grass clippings you can have a real steamer even in October.

No need to try to heat it up next spring, just turn it once late this fall and again as soon as you can in the spring. You may have compost by planting time. Start a new pile in the spring and when you use the first pile, toss any uncomposted stuff into the new pile. Always use compost when it's done, it can be used as a top dressing even in mid-season

Activator products are not necessary, everything the compost pile needs is already there. Kind of a gimmick in the opinion of most if not all compost geeks.