I believe it would but "like" is more appropriate in this situation. Ona kocha dzieci - would mean "She loves children" (I think)
"lubi" = "likes" and "kocha" = "loves", so no, "She loves children" would be incorrect.
Its has an english 'ch' sound instead of the 'ts' sound because there is an i following the c. Whenever you have ci, you pronounce it as 'chi' as opposed to the normal 'ts' sound of c in Polish.
I guess it depends on the language... It does not have in portuguese... I guess in english you use 'SH' for the sound without the 'T' sound