Serious Planning to move out of my house.

1. You will have to pay for
A house
A car
Gas
Electricity
Water bills
WiFi
Phone bill
Food
And any sort of medication you have

That's if everything goes well and you don't get sick or in an accident.

2. Taxes vary from state to state. You need to do your own research for that kind of stuff. Just look up "how bad is tax in *state*"

3. You contact the person. Set a date to buy your item. Then go over and buy it.