All really come down to personal preferance and budget so its hard to say but here are my recommendations

Pram: Thats one you need to decide on your own as there are so many different types out there its hard to recommend without knowing what you need specifically in a pram. I have a peg perego skate that i absolutely love, but they are far from cheap. Others will argue the skate is crap im sure, but for me its everything i need in a pram and i love it.

Cot: You cant go past anything Boori. Fantastic quality furniture that is solidly built and will last for generations to come. Worth every single cent. Their change tables are fantastic too.

Car Seat: I recommend safe&sound's meridian ahr. Very good and safe car seat.

Bottom line is though, pretty much everything available in the shops is safe. They cant be sold if they dont meet australian standards. So whatever the price, i think you can feel confident it will be safe and if you have any doubts, ask or research online. They all do the same things, it just comes down to quality and price.