IF all accessories work and when you are given a jump start and all you hear is a click of the solenoid.... then I would check your battery cables and terminals for corrosion and tightness.
Check your voltage at the battery before and during when you are receiving the jump start to see what it is and then when you actually turn the key to see what voltage is present then....
Is it a stick or automatic...? Could be the neutral safety switch !!!!
As a last thing to check..... I would suspect a bad starter.... The solenoid contacts are not transferring power or the starter itself is bad..... ???
Hard to troubleshoot when you are not there !!!!!
2000 Ranger 4.0L 4dr 5 spd 4x4 w/ ORP
Modifications: 265/75R16 BFG AT KO, Detroit TruTrac l/s, K&N FIPK, 66mm BBK TB, Gibson 2.5" catback exhaust, BAMA SCT Tuner, Underdog Performance 25% underdrive pulley, James Duff Traction Bars, Taylor 8mm sparkplug wires
Future Mods: JBA Headers