we had exactly the same issue with stored toys. Similar age gap between kids for us as you. I cleaned over the plastic ones with disinfectant etc. the stuffed toys I wiped over with a cloth with microshield on it and hung them on the line for a couple of days. I then gave them a spin in the dryer if i could or a blast over the ducted heating vent.

give it a go- if you can save them its a bonus
plus i found in the end that in such a short time the toys had dated and people bought the new bubs new ones anyway!

ooh not long to go now!!