"Li ne povas havi tion."

So it's conjugated and then infinitive just like in Spanish?

I totally heard 'tion' as 'teon', here.

Is this the answer to the "he likes to have money"?

Why is "this" wrong?

if ne povas means cannot, then how do you say "doesn't have to" ?

Huge question. Could I rearrange the wording and do "Tion havi ne povas li", because I know it's complicated but I would like to know how flexible Esperanto can become. :3)

For me, this came up just after: ‘He wants to eat a kilogram of tomatoes.’ Kind of works.

what did he do

In English, "can" is for both ability and permission. Does Esperanto's "povi" work the same way?

He doesn't have ... = Li ne havas ...