I am getting ready to alter my current setup as follows:

I have a home router that I will connect to a TL-SG105E switch on port 1. I will set up MTU VLANS using port 1 as the up-link port. As I understand it, this will create ports 2-5 as individual VLAN's. (VLAN 2 - VLAN 5) Each VLAN/Port is isolated from each other.

Question 1: Does this also isolate my home router network? Maybe as VLAN0?

I have additional routers connected to ports 2 & 3. They have their own subnet each. I use DHCP on each router. That way the WiFi and ports can be freely used in the respected VLANS. I have the default gateway in each subnet router set to my home router ip.

Question 2: Will the traffic from the new VLANS get access to the internet through my home router with this new setup?

Note: Home router is a Netgear RAX54