I'm not sure any of them would benefit from the expenditure to have them graded and slabbed, but that's just me.
Those are some really cool and nice coins. I have never seen that Peruvian issue before! I like it! I believe the Mexican piece is a token, although I don't know anything about its gold content.
The small Mexican gold coin is referred to as a Maximillian "gold fantasy token" and it contains .006 gold. They can sell for up to $40.00 today. Here's an example: link But some are apparently worth around $1, according to this link. I think some varieties exist. Yours seems to match the ones that I've seen selling for $30 - $40, but I'm no expert on these, either. I have one hiding somewhere.