What should I know about 2nd gen?

Hey y'all,
I have had my first gen for a couple of years. But lately, have been thinking about selling it a getting a 2nd gen. Not a new truck, just new to me. I made the mistake of buying a truck with too much rust. Body is in good shape, and my engine is good...frame not so much. So I am looking to sell it and I have been looking at a rust free southern tundra. I found one in TX that I like. Anything I should know about 2nd gen? Obviously there are a lot of differences. There is no timing for belt, right? I think they have a timing chain? I have been really happy with Toyota dependability and am looking for a keeper. Thanks for any advice. I should I interact more, I know I don't post enough, but appreciate all the knowledge and experience that is here.

 

Nevermind, keeping my 1st gen for now. Need to pay off wife's car first.