Is it permissible for me to say to non-Muslims "And the same to you" when they wish me a Happy New Year or say Best Wishes?

Our daughter is having strange experiences during sleep. She complains of feeling something pressing down on her chest which paralyzes her entire body. She cannot even speak. This stops and starts throughout the night. It happens so frequently that she has become depressed and angry. We feel that this is an attack from the Jinn and we want to know what she can do about it.

My neighbour is an American Christian, and she and her family brought me a gift when it was Christmas. I could not refuse the gift, lest she be offended.  
Can I accept this gift, as the Messenger (peace and blessings of Allaah be upon him) accepted gifts from kaafirs?

When I do Salah (formal prayers) or intend to do good deeds I often get very evil thoughts in my mind. When I concentrate in Salah, and try to focus on the meaning of the words, evil thoughts enter my mind, which make evil suggestions about everything including Allah. I feel very frustrated and angry about this. I know that none forgives sins except Allah alone, but because of my thoughts I feel that there is nothing worse than to have evil thoughts about Allah. After Salah I ask Allah's forgiveness, but feel very bad because I want to stop these evil thoughts, but I can't stop them. These thoughts spoil my enjoyment of Salah, and also make me feel as though I am doomed. Please advise me.

I don't celebrate Christmas in any way, but my 11 year old daughter loves the beauty of a Christmas tree when decorated. Is it permissible for me to have one in my house throughout the year?

I am currently living in Canada for the purpose of study, but my permanent place of residence is between Jeddah and Amman. When I stayed in Amman during the summer break, I decided to go to Jeddah to deal with some official papers, and I intended to do ‘umrah if Allah made that possible for me and if I had a mahram and enough time to do ‘umrah. I intended to do ‘umrah from Jeddah because my mahram would be there. But because I was not certain that I would be able to do ‘umrah, on the day I travelled by plane I did not do ghusl, because I was menstruating and I had not yet decided to do ‘umrah. When I got there on the second day I did ghusl and formed the intention to do ‘umrah from Jeddah, and I did it.
My questions are:
Is my ihram from the miqaat of Jeddah considered valid or not?  Because of my family circumstances, we are always moving back and forth between Jeddah and Amman, and we always enter ihram from our house in Jeddah, even if we are on our way back from a trip to Amman and after staying in Jeddah for several days. We do not remember how many times we have done ‘umrah in this manner.
What is required of us if we should have entered ihram from the miqaat for the people of ash-Shaam (Greater Syria)? After I did ‘umrah I was uncertain as to whether I was completely clean following my period. If I think it most likely that I was still menstruating whilst I was doing ‘umrah, what is the ruling on my ‘umrah and what expiation do I have to offer?.

Is it permissible to remove janaabah by means of tayammum?.

What is the Islamic ruling on the issue of imitating the kuffaar in their customs and dealings? What are the guidelines concerning that in Islamic sharee'ah? Is every imitation of the actions of the kuffaar regarded as a haraam kind of imitation, knowing that there are many things that the kaafirs do that are not haraam and are not condemned by sharee'ah, where the one who does them does not do them merely to imitate the kuffaar, but because he thinks those things are good, as Ibn Mas'ood (may Allah be pleased with him) said: "What the Muslims think is good is good before Allah"?  
Please advise us, may Allah honour you, and please give me a detailed answer and explain to me the guidelines on this matter.

I wasnt aware that ramadan fasts missed due to menstruation had to be made up before nafl ones and I started keeping some nafl ones so is it possible for me to change the intention of the previous nafl ones I have kept or to change the intention of fast during the day? Because the one I kept today for example I started off with the intention of keeping a nafl fast but can I now change this to the intention of making up the ones I missed in ramadan?

When I went to do ‘umrah, I was menstruating, so I did sa‘i and cut my hair, and I exited ihram and put on niqab. I waited until I became pure, then I did tawaaf at the Ka‘bah. I did this based on the ruling on Hajj, which says that the menstruating woman should do everything except tawaaf. Please note that I am not married. What is your opinion, may Allah bless you?

May Allah reward you with good for answering my question, but I think that it needs further explanation of the issue of sprinkling hot water on the private part, because the wet dream occurred at the time of ‘Asr prayer, and I have a problem, which is that maniy and even madhiy continue to come out for a considerable period after they are first emitted. It often happens with me that one of them is emitted at the time of prayer, whether that is because of thinking or because of a wet dream, but in order not to miss the prayer, I sprinkle hot water (on my private part) so that whatever is left will come out. Please note that I do not feel any desire when I use this method. Now I am going to make up the fast of that day that I told you about, in sha Allah, but what should I do if maniy continues to come out whilst I am praying? Should I pray in that case?