Parts help for 2004 vw polo twist

[Chiddo]

A friend of mines has bought a 1.4 polo twist and he doesn't know when the Cambelt was last change or the aux belt and the water belt.

Could someone confirm if he is buying the right parts from gsfcarparts.com and weather non oem Cambelt and aux belt and water pump will be a problem? Furthermore is it the aux or the Cambelt kit that he needs to buy a quantity of 2? Or just one?

Parts:

Hey guys I'm trying to help my pal out he has a 1.4 04 plate polo twist and he wants to take advantage of the gsfcarparts offer. Could anyone confirm if these will be compatible with his car?

Sparkplugs: http://m.gsfcarparts.com/905aa3600
Oil filter: http://m.gsfcarparts.com/120vg0120
Fuel filter: http://m.gsfcarparts.com/121vg0120
Cambelt/timing: http://m.gsfcarparts.com/
Aux belt: http://m.gsfcarparts.com/135vg0030

He has put in reg in btw

Thanks