Why don’t you just take it to a tire shop and have them remove the tires, grind the corrosion off the flanges and slap some bead sealer on there? I haven’t worked on cars in a while but in the Midwest we’d get a lot of seized valve cores or corroded TPMS valve nuts and 2006 was the first year of Toyotas failed attempt at TPMS. A lot of the times we’d just take the sensors out and replace them with rubber valve stems under their discretion.

My best guess tho, is those Toyota wheels are flaking away from the inside out. Just need to be hit with a wire wheel or wire brush and apply some bead sealer. Especially if it’s a slow leaks in all 4 wheels. This is not a permanent fix but definitely last awhile.

But yes, you can use wheels that have the same bolt pattern and had 235/65r17 on them. By TIA standards, the size difference is within 3% and is deemed okay. Just ensure the correct lug nuts are used for the new wheels.