Diesel pipes to pump/sender unit

https://goo.gl/images/hrFMqH
Dunno if that worked.
Needing to know what the name of the bit on the end of the fuel lines that plug into the coloured bits. Also, thinking might just renew the fuel pipes while I'm at it. Where could I get them (and the other thingys) and what are they called?
As you can tell I'm a "know what it is but f***** if I know what it's called" type of guy.
Look forward to your boundless wealth of knowledge being able to help me out. Thanks in advance.

youd need to buy the fuel pipe or pipes,but if it leaks at the pump end its usually the seal in the pump outlet