The answer before of it depends on where the sources of interference are located still applies.
1. This will be twisted pair so reasonably OK noise wise.
2. This will often be a flat untwisted RJ11 plug lead so probably largest source of noise pickup, replace with a twisted pair RJ11 lead
3. That is an Ethernet signal which is immune to noise up to 100m in length so no worries there.
4. Again this is Ethernet and thus good for 100m of run using CAT5e
On the final 1 and 2 what do you mean by single core, are you talking about the difference between infrastructure cabling (solid cores in the 4 pairs) and patch cables?
The choice does not matter with respect to noise, but for wiring between two sockets you use infrastructure cable which is slightly less flexible that patch cords.
In an ideal world you convert the VDSL2 to Ethernet at the earliest opportunity in the property. In the real world this is not always possible so the choice is yours to trade a few metres of phone cable against a more convienent location for the Openreach modem.