I have a Nissan Quest 95 model. Last month my car gave a trouble for starting and I got a new battery from Sam's Club and this Saturday, when I tried to start my car, did not start. Also did not work any car lights or radio. Totally dead! We open the car hood and touch the wire around the battery and my car start.
Sunday, I took the car back to Sam's Club and the mechanic check the battery and it was OK. Today, morning my car start in a first try but when I tried to start at the evening it did not start. Again, I open the front hood and touch around the battery's wire and it start.

After 10 minutes drive, I came back and it stopped again. I tried to touch all wires around the battery, but its not starting. Can you please suggest me something so, I don't have to spend bunch of money - since I'm unemployed.

Clean battery terminals and cable connections of all corrosion, apply dielectric grease, and tighten cable connections. Remove the negative battery cable first and replace it last. Use a battery brush, abrasive cloth, or even sandpaper.

Ya, I agree with the greasemonkey. Clean up your battery cables. Then make sure you have them on tight. You should not be able to wiggle them. It sounds like they're loose and when you mess with them it makes the connection. If they're not tight the alternator won't charge the battery either.

Whenever your car is "completely dead" like that, start with checking your battery connections.

Go with the simple things first!