When you put car in Drive it wants to roll back like its in reverse,what could be wrong?

SOURCE: transmission??

Have you checked the transmission fluid level? The car should be driven for 20 minutes or more, then with engine running vehicle in park, pull out dipstick, wipe clean, reinsert, check level.
When the car doesn't go anywhere, do you let it idle for 5 mins before you drive? If yes, the fluid level could be low enough that 5 min idling warms it up just enough that the fluid is expanding and slightly raising the level just enough to operate. The fluid on the dipstick should be pink, if it's dark you should have it changed, along w/ the trans filter. Be careful of fast change shops, as some just shove a hose down the dipstick tube and suction some of the fluid out. This is NOT a fluid or filter change, just a small amount of fluid is removed. Hope it's just the fluid level, but keep checking on regular basis, as running w/ low fluid (or overfilled) can ruin a trans. countrycurt0

SOURCE: Car only drives in reverse.

this is most likely the forward gears in the clutch pack.i em doing a rebild on one with the same problem not fun.

SOURCE: car won't drive forward or in reverse

this is the speed shift solenoid and a possible faulty transmission filter as well. the best thing for this issue is to pull the tranny and check for filter clogs and change the shift solenoid.

SOURCE: Everytime I put my car i park it goes into reverse.

It sounds like you have a damaged shifter cable.It is an adjustable cable but if it is that far out of adjustment then it is probably damaged. Replace it.