Hello.. Here is a very short answer to ur questions:-
SO...KRISHNA--very innocently but super crazily falls in love with PRATIGYA at first sight ....Due to his friends' and frienemy ie ANGAD's (hope u know who he is, coz he is an important character) misleadings---KRISHNA believes that PRATIGYA too loves him... and then comes lots of dramas where he stalks Pratigya with fon calls, love notes and coffee and saree, lol.....PRATIGYA's attempts to stop him backfires and he is confirmed that PRATIGYA loves him.....KRISHNA breaks off PRATIGYA's marriage with another guy and blackmails, lol, his own family (who dint want to have nything to do with KAYASTHS) by slitting his both wrists (must watch!!!) His family agrees but PRATIGYA's family insults them out of their house 😆 Then ANGAD kidnaps PRATIGYA and copies the tattoo on KRISHNA's hand (of PRATIGYA's name) and makes her believe that KRISHNA is the one who kidnapped her...PRATIGYA comes home (unharmed) and decides that she has had enough...She agrees to marry KRISHNA....Wanting to protect his sister, ADARSH tells KRISHNA that If he wants to marry PRATIGYA, then ADARSH will marry KOMAL...KRISHNA agrees ...but then,,,lots of dramas to get Sajjan Sigh's consent who was finally convinced by GURU MA (SS thinks of her as a goddess)....phew!!!
So, u can see KOMAL had nothing to do with the marriage, lol, she was just caught in between the both guy's conditions, lol!!!
NOW, about the money matter, well as u can see KOMAL is a spoilt brat, and after marrying their daughter into a junglee family, the SAXENA family werent ready for KOMAL's whinings or more like, her swearings, lol...so, they all, including ADARSH, ignored her to keep peace....... AND KOMAL called her dad, Sajjan SIngh and made all her complaints....SS came to SAXENA house for some rasam called chauthi and brought those money with him...He threatened them that if they hurt his daughter, he will hurt theirs' and I guess u can imagine how he must have insulted the SAXENA family with the money.......
SOO THERE!!! I hope that helped, BUT would like to add this: DO watch this serial; I mean, if u r finding the recent episodes interesting or exciting, then I can bet that u would love it from the beginning episodes, esp coz of lots of Krishna-PratigYa scenes😉
PS: Just a warning: there are quite a lot crying scenes, esp in the SAXENA family, esp before marriage...and some scarry/violent scenes that includes PRATIGYA and SS family....