"I recognize this boy and this car."

[kitbogan]

Is "auto" neuter, "automobil" masculine inanimate? Why not "Poznávám tohoto chlapce a tento auto" ?

[JanLyko]

Exactly.

So it would be "Poznávám tohoto chlapce a toto/tohle auto".

[Dmitry532061]

And
Why "auto" isnt correct?
Is there a big difference between "auto" and "automobil"?

[BoneheadBass]

Both auto and automobil are accepted. Automobil is masculine, so it would need tento. Auto, however is neuter, so it would need toto. Also, chlapce requires tohoto. Adding -to or -hle to the end of the demonstrative turns "the/that" into "this." See earlier comments above.