I turn the key it make a click click click sound

Hi, My 2001 winstar just failed from one day to the next, I got back home parked it and in he morning it wouldnt start, then I messed with the gears a little because they were kind of loose then I disconnected the battery for and hour and it started, but the next day I got stranded again, a friend told me that the gear shift cable was loose, another told me I just need to replace the starter, another told me I need the lucus antislip transmission oil and my uncle told me Its just the solenoid and doesnt need a new starter, please help me I really need my van, when I turn the key it make a click click click sound and all the lights turn on and there is a temporary beeping in the back row somewhere, I can never get to it before it stops beeping to see what it is.I dont know nething about cars but im desperate to learn please tell me how to fix it. I have no money I really need to travel for my work please help me Id be so greatful.