Question

What useful things I need to take to outer space

Answer 1

1. A source of oxygen
2. Something to control temperature; we humans need a temperature that is neither too hot nor too cold.
3. Protection from sunlight
4. Water 
5. Food

Answer 2

the important things are:
1 oxygen carrier, food ,water, special suits of astronauts space suit(as it protects astronauts from radiations and maintains the proper temperature of the body)...
most importantly a packing to keep your output mean waste materials...