that tube returns some gas to the intake, you don't need to pump stuff into the crankcase which is just the space inside the motor under the pistons that houses the crankshaft and connecting rods (accessible by removing oilpan). The exhaust gas is metered into the intake when the engine is under low load, to displace oxygen to reduce the chance of detonation while increasing cylinder pressure for more complete combustion. The EGR has not been working on mine for 2 years and I never saw anything bad come of it so it is getting removed altogether.
To remove it, remove that pipe and the EGR valve it leads to. Cap off the exhaust manifold nipple and make a plate to block off the hole in the intake. Trace the vaccuum line that was on the EGR valve to the thing on the passenger side strut tower, and remove that. Then trace the other vaccuum line attached to that thing back to where it plugs into the vaccuum manifold on the firewall, and remove both vaccuum lines and plug the nipple on the firewall. The absence of EGR valve and vaccuum solenoid will trip the check engine light though.
as to the crankcase, there IS emissions stuff on there called PCV (positive crankcase ventilation) which is basically a path between there and the intake so as combustion gas blows by the piston it gets sucked into the intake and re-burned. That should be left alone as it doesn't hurt performance as long as it isn't spewing oil into the intake.
