Sounds like you have a K03 turbo on there then.
You need the exhaust manifold from a 1.6 or a 1.9 that doesn't use a K03. Any will do.You need a mk3 downpipe from a K14 or a T2. You will need to change your intake boot, I don't know what one fits. You will also need to change the elbow from the turbo to the intake. As for the oil line, cut and splice a 1.6TD return line into the bottom half of the 1.9 line. It's low (zero) pressure so rubber hose rated for high temps and hose clamps will suffice.