What to recite to save oneself from "nazar"

Q: In Islam we know that there is something known as "nazar" or "the evil eye" and what are its negative effects and harms etc.

We would like to know, is there also such a thing in Islam as "sweet nazar" or "good nazar"?

For example, when a father or mother looks at his/her child with a look of pure love and forgets to say "Maashaa Allah", then can this glance of love have a negative effect on the child? Since there is no question of jealously for one's own child, can there still be negative effects in an innocent look out of pure love?

If so, does this principle apply to everything that is dear to you?

For example, if you look at your own car or house with a look of amazement without saying "Maa shaa Allah" then can this have a negative effect on it even though there's no question of jealousy for your own belongings. 

Buying and selling plot files

Q: I want to ask if it is allowed to sell and purchase plot files? The housing society is still underdevelopment and possession of plots is not given to file holders.

(The file is a document issued by a housing scheme developer, against which one can claim a piece of land/plot once development is done, and possession started by the developer)

Marrying a married woman

Q: I want to get married to a Christian girl and she is even willing to convert to Islam now. She is not Muslim yet, actually she was with a Muslim boy before and he took her to the mosque to do nikaah as she only did it because that boy wanted her to go to mosque with her and they did as well but as per her she did it because that boy wanted to do nikaah with her according to Islam. The permission of her mother was also not in it.

My question is, was the nikaah valid or not, as she said yes in the mosque in front of the Imaam. If the nikaah is valid then what should I do?

What is a Muslim’s duty towards beggars?

Q: What is a Muslim’s duty towards beggars?

Is it absolutely obligatory to always give them money irrespective whether they are Muslims or not and irrespective whether they are genuine or habitual. Most appear to have made begging a living.

We constantly get lots of beggars (both Muslims and non-Muslims, young and old) that regularly come round and expecting money. If a nominal amount of money is given, it is often refused and, if food or anything else is given, it is simply also refused or thrown away.

We also get many Muslim youngsters that appear healthy and able to work; yet come around begging. In this instance, can one refer them to the nearest Jamiat Office who will no doubt screen them and ascertain if they are actually genuine and do qualify for assistance? Kindly advise.