Having the urge to pass urine while performing umrah

Q: Someone went for Umrah and before starting, emptied his bladder as he had the desire for it and then reached Haram Shareef. It was too crowded and he had to walk a long distance to enter Haram as the passages were closed. Now after a while, before starting Umrah, he again had the desire to empty his bladder (though he did not eat or drink for the past 6 hours to avoid this problem). He felt it is difficult to go out to relieve again and started and completed Umrah and during Umrah, Esha jamaat as well. That feeling was off and on. 

Will the Umrah be valid? If not what is to be done, sadaqah or repeating the umrah? 

If umrah was not valid, did he come out of ihram after completing Umrah and performing Halaq? 

He repeated Esha prayer. Was it needed or not?

Believing in the theory of evolution

Q: If a person does not believe in human evolution, he believes in creation of humans as Islam presents it. 

However regarding other life forms on earth, he believes they were evolved guided by Allah, not independent of His guidance. Does he become a kafir? His reasoning is that as far as his understanding goes, Islam is silent on how other species came on earth so one doesn't need to tie one's self to a specific belief. 

Does that person becomes a kafir? Please advise.

Ownership of gifts given when a baby is born

Q: I would like clarification on the following points: 

1. Is it necessary to ask regarding ownership of gifts when a baby is born? 

2. As far as I know and understand, if a gift is given to the child themself, it cannot be used for other siblings or given away when old but has to be kept until they can decide what they want to do with it, is this correct? 

3. In my situation, I tried to explain the above to my in-laws when they gifted a cot, asked them to clarify whether it belongs to my husband or the child (who was not yet even born). I explained also why and how it affects in future. But they insisted they want to gift it to the child not my husband but they want us to use it for our future kids. Mentioned that in their days that's how it was understood and money or jewellery was kept only for the child themselves. 

Seeing as they weren't understanding we didn't push the issue but they mentioned clearly that it belongs to him so we decided we'll cover the cost so it belongs to my husband and that way we can use for our future kids or give away when old. 

Now when the baby is born they gave clothing as gifts and when I enquired as to who it belongs to, they replied that it's his and if we don't want can return and keep money for him but we can use for future kids. 

Do I take that to basically mean that it's his and we'll have to replace his things in order to use for other children or give away? I don't wish to mention anything further as that may irritate them. 

4. Is it permissible/possible to gift an item to an unborn child?

Making salaam or saying Alhamdulillah to a sneeze when a portion of the satr area is exposed

Q: If a man is wearing shorts and his knee and a portion above his knee is exposed. Can such a person greet? As they are saying the name of Allah while their 'awrah is exposed? 

And what is the ruling regarding saying alhamdulillāh after sneezing when one is dressed in a similar manner? Is it makruh or more serious?

Leaving behind in the estate a house built on waqf land

Q: My Mother passed away leaving behind a house on a Waqf land which she rented. The land is such that we rent it for R5000 per annum. Then we have the option of building whatever we want. Now that she passed away leaving behind 3 sons and her husband. Will the house form part of her estate or not? 

Please provide references from the Hanafi Mazhab as one of the brothers is very adamant on following the Hanafi Fiqh. 

Some other Mufti mentioned that in Hanafi Fiqh, such a house built on this kind of Waqf land will not form part of the estate as such, rather the value of the house in the form of rubbles will be calculated or something like that.