as you lot seem like a friendly bunch wonder if you can answer a few questions for me pleaseee xxx thanks

1, How do i get them litter trained..
2, do i use special litter or give her her own litter tray
3, she is now just over 5 weeks and starting to eat food
so far all ive tried is kitten food mixed with special kitten milk and warmed and mashed up,is that right?
4,also my other cat is pregnant when she has the kittens is it okay for my other kitten to go near her kittens daft as it sounds.. ive never had a cat from a kitten so i have no idea thanks xxx