Which state are you in?
1.) how much are you going to drive it?
2.)depends on your state, but for 01's i would think the registration fees are small compared to newer cars. (also smog)
3.)now because you just got your license you're not going to be able to get brand name insurance unless you're willing to pay 600 dollars a month. so look into knock off insurances (be careful)
4.) again that would depend on how you drive it, and the state of which the car is in right now. Change your oil every 3k.