I was given an old TracPhone - now what?

[dlb]

I was recently given a TracPhone w/ the charger (made by Motorola, service by ATT) and it hasn't been used in at least 2 years, probably closer to 4 years. There's a sticker on the phone with the telephone number for the phone, but I have no idea if that number works. The 'status' on the phone says I have 4min of pre-paid time left. No- I haven't tried to call anyone, and no-one has tried to call me (yet) using the number on the sticker... I know less than NOTHING about cell phones, and even less about pre-paid TracPhones that have been passed down......
Questions:
1- how should I proceed?
2- the time setting is WAY off (it's about 3.10pm local time and the phone says it's 12.01a) and I couldn't find a setting to change it, nor could I find anything relating to a calendar or date....
3- do I need a new SIM card?
4- uhhhh????? what should I do with this? is it worth the trouble to get it going? is it going to cost more time/trouble than it's worth?

Being a complete noob idiot when it comes to phones, ANY info will be appreciated!

THX!