What engine has the least issues

I can buy either First Generation or a second Generation.

I will be Driving down south to Buy a verified Rust Free Sequoia.

I would never buy one without a PPI

It has to have AWD/4WD.

It will be living in extreme cold and snow

I have been hearing some things about the 2nd Gen engines, having issues.

If you could start all over and buy a different generation, would you?

Have you owned one generation and had issues and wish you bought the other?

I am fine with replacing a timing belt, if the that engine is better one.

Can you give me some advice, what would you buy/search for?

Thank you so much!