What to fix on my vauxhall corsa?

there is a red oil leaking from the passenger side from underneath, the AA guy said it could be wear its come off the gearbox, is that all thats wrong, there no drive in any gear after driving down a bypass an the car started to sway around on the road while holding the stearing wheel straight, turning it into the hard shoulder was hard there was no steering response, now when it is in gear it jus revs on the spot and you can hear a clunking noise, what needs to be fixed, i heard that a driveshaft can be popped back in