Hi Rukia, I've got both a juicer and slowcooker (bought before I had baby) and found that I hardly used the juicer during both pregnancies and for my boy. The slowcooker is very handy for cooking dinners especially if I plan to go out during the day so when I come home dinner is ready. I've never cooked porridge with it though, usually stews and soups.
Things like steaming food can be done over the stove, no need for fancy appliances. Also no need for blender as baby doesn't need blended up food for more than a week... but handy for making soups or smoothies.