Probably no more than is used finding, drilling, extracting new petroleum wells. Especially as we seem to have already gotten to a lot of the 'easily' accessible crude oil, and are drilling in Arctic and Deep Sea environments.

Seems like a sunlight rich area such as the Nevada high desert is about as energy friendly as one could imagine. The main requirements seem to be water, sulfuric acid, and (of course) power.

It very much depends. There are many different ways of mining lithium.

An Australian hard rock mine will use the same amount of fossil fuel as any other hard rock mine.

Brine operations don't use much but the lithium still has to be transported from a desert.

Future technology such as DLE (Direct Lithium Extraction) have to potential to require basically no fossil fuels at all.

These type of questions are not serious. This person already knows it's just a tiny fraction of what a non-EV vehicle will burn throughout its lifetime.

Just downvote, flag, and move on.

People are weird, I think fossil fuel is idiotic too.