Moving into a house with some stuff of the old owner

Q: I have moved into a new home. The previous owner was not Muslim. He had left some baking trays that fit into the oven that he left here which I presume he was not using. I am not sure if he would have cooked any haraam food with the trays. I wanted to throw his trays away but now some of my baking trays were placed in the same draw and they got mixed up so I don't know which are mine and which are his. Is it fine if I end up using the dishes that he used to cook with as long as its washed with sunlight and water?

Hadith on standing for a brief while in the path of Allah Ta'ala

Q: Rasulullaah (sallallahu alaihi wasallam) said, “Standing for a brief while in the path of Allaah is better than performing salaah for sixty years at home. Do you not want your sins to be forgiven and to enter Jannah?” (Mustadrak).

Is this only for jihad where you have to fight kuffar or mushreekeen or this sawab can also be obtained in tableegi jamaat where you have to stay in different mosque and call people towards Allah. 

Exactly what is Allah's way? I have heard that a person that earns halal is in Allah's way and a person walking towards the mosque for salah is in Allah's way. Now the sawab of more than 60 years nafil salah can be obtained by the person earning halal and walking towards the mosque for salah?

Person can't remember issuing talaaq

Q: My wife betrayed me by having an affair. 

During the time I questioned her on the details of the affair I became so angry and out of my mind she told me that I have given her 3 talaaq in that moment. 

We both want to work on our marriage and not separate paths. 

I do not recall giving these talaaqs as I was so furious about hearing the details I don't even recall the entire conversation. 

On a side note, I have been diagnosed years ago with severe depression and bipolar disorder and I am a Muslim revert with not much sound knowledge on divorces hence I'm asking for your feedback. 

Trying to look for answers online are insufficient as they all differ in favor to my situation and similarly not in favor of my situation. 

I will appreciate any assistance in this regard more especially due to the fact that I can't recall it from my anger and that this surely was never the intention.

Leftover water of dogs and monkeys

Q: In regards to leftover water of an animal-specifically cats, rats-there is a hadith giving leniency to using its water due to it entering the house often, to this effect:إنما هي من الطوافين و الطوافات, in today's times, can dogs and monkeys be regarded as الطوافين و الطوافات?