1) I see on blockstream green wallet on ios and it allows me to use a hardware wallet. If I buy a cable that gets me to use it with my iphone will that work?
Unfortunately, no. Due to the way Apple makes iOS, apps can't talk directly with hardware wallets or most devices. That's why, for example, the Nano S doesn't work with iOS but the new Nano X does. The new Nano X has bluetooth, and that's how it talks with the Ledger Live app.
3) Is brave running Tor secure using trezor wallet or does that make no difference even if I use my basic firefox ? I'm currently on a exit node of Tor is this safe ?
Honestly, it should be pretty much the same thing. Unless you want to avoid Trezor somehow tracking your IP (I doubt they do), other browsers should work fine.
