Thanks Zeracer,

There was a leak coming from a join on the exhaust, was clear in colour, i'm guessing this is water?

I've put about 2-3L of transmission oil in total cycling threw the gears as Zip suggested, tried to move forward and backward a little bit, it did move, however I had to give it high revs of 3-4k, haven't bought a dipstick yet so unsure of levels, but i'm guessing it will need a lot more transmission oil than the 5L I have.

Problem is it's in the garage on an incline, so letting it run will give me carbon dioxide poisoning if i'm not careful, and I don't want to bring it out of the garage incase I can't get it back in!