hey man i know you are new and all but for future reference when you make a thread saying your car is running weird you should post simple mods and info about the car that would help.
like the above asked is it an auto or a 5 speed, how many miles, etc
with that being said if you are leaking trans fluid( automatic trans have fluid and manual trans have gear oil). then you can probably add some fluid and see if your issue gets better.
now if its manual and you are leaking that wont make a difference on how it drives unless the oil is gone. but most likely the clutch is shot!
good luck and i wasnt trying to be a dick, just my nature.
edit: your speedy response caught me off guard and your clutch is shot!