Maybe not relevant mate , but just had my daughters Tigra gas tested and yes the head gasket was indeed gone , was looking at £500 + for a fix , sad days for my poor daughter , but then there was intervention , "K-Seal" a bottle from Euro Car Parts was only £11.00,apparently permantley repairs head gaskets , 4 days in , cars running , no loss of water , no over heating ..................fingers crossed but maybe a light at the end of your tunnel and maybe worth a look at to get you by.
Hope its not the head thou mate , i wish you luck.