What's this do?
 

Cleaned the engine compartment of my MKIII Tubo as much as reasonably possible (without disassembline everything) and I found a couple things. Need to know what these parts are (what they do) so I know if I have to replace right away.

Whats this do? The red hose has a crack right where the red arrow is pointing but I dont hear air coming in, so it can wait unless it is critical. (when I say wait.. I mean about 2-4 weeks)

The line coming off of where the blue arrow is pointing leaks where it goes into the motor below the intake manifold. Doesn't look like a high pressure hose and I dont see any cracking, so may just be hardened. What's its purpose? (It comes out of the engine, just below the oil filler cap)

http://www.gdscentral.net/88supra/problem1.jpg

Thanks for looking!

Idle control valve .......is name of the part that that hose goes to under the intake..... Yes you need to replace it as soon as you can.. its not alot of money...it can cause car to run lean as its pulling air from outside before the MAF .. the thing the air cleaner is hooked to.... the MAF calculates how much air is going to engine by heating up a wire inside.... the amount of air that flows over the wire cools it down and changes the resistance in wire... so now the ECU know how much air is going to engine and then tells how much fuel to put in to get the right AFR.....So the red hose leaking air into the engine will not give a corect reading... so yes it should be replaced as soon as you can...

okay! : )
Will order it on Monday then. Is there an improved version or is OEM fine?

just get from toy dealer... Your car looks like its all factory... keep it that way.. Make it worth more in long run

keeping it all factory except for intercooler pipes, exhaust and intake. and wires/sparkplugs... The rest are just bonus items that should be there but arent