1) What did Allah prepare for those among the Jews and Christians who believe?
(57:28)
O you who believe (in Musa (moses) (i.e. Jews) and Isa (Jesus) (i.e. Christians)! Fear Allah, and believe in His Messenger (Muhammad (PBUH) _), He will give you a double portion of His Mercy, and He will give you a light by which you shall walk (straight). And He will forgive you. And Allah is Oft-Forgiving, Most Merciful.

2) What is the likeness of lsa (Jesus) before Allah?
(3:59)
Verily, the likeness of Isa (Jesus) bofore Allah is the likeness of Adam. He created him from dust, then (He) said to him: “Be” – and he was.

3) What did Allah say about Mary?
(3:42 – 47)
42:And (remember) when the angels said: “(O Maryam (Mary)! Verily, Allah has chosen you, purified you (from polytheism and disbelief), and chosen you above the women of the Alamin (mankind and jinn) (of her lifetime).”
43:O Mary! “Submit yourself with obedience to your Lord (Allah), by worshipping none but Him Alone) and prostrate yourself, and Irkai (bow down) along with ArRakiun (those who bow down).”
44:This is apart of the news of the Ghaib (unseen, i.e. the news of the past national of which you have no knowledge) which We reveal to you (O Muhammad (PBUH) ) You were not with them, when they cast lots with their pens as to which of them should be charged with the care of Maryam (Mary); nor were you with them when they disputed.
45:(Remember) when the angels said: “O Maryam (Mary)! Verily, Allah gives you the glad tidings of a Word (“Be”- and he was! I.e. Isa (Jesus) the son of Maryam (Mary), from Him, his name will be the Messiah Isa (Jesus), the son of Maryam (Mary), held in honour in this world and in the Hereafter, and will be one of those who are near to Allah.”
46:“He will speak to the people in the cradle and in manhood and he one of the righteous.”
47:She said: “O my Lord! How shall I have a son when no man has touched me.” He said: “So (it will be) for Allah creates what He wills.
When He has decreed something, He says to it only: “Be!” – and it is.

4) Was Jesus crucified and died on the cross?
(4:157–158)
157:And because of their saying (in boast), “We killed Messiah Isa (Jesus), son of Maryam (Mary), the Messenger of Allah,” – But they killed him not, nor crucified him, but they resemblance of Isa (Jesus) was put over another man (and they Killed that man), and those who differ therein are full of doubts. They have no (certain) knowledge, they follow nothing but conjecture. For surely; they killed him not (i.e. Isa (Jesus), son of Maryam (Mary) (PBUT)).
158:But Allah raised him (Isa (Jesus) up (with his body and soul) unto Himself (and he (PBUH) is in the heavens). And Allah is Ever All- Powerful All-Wise.

5) Was Jesus the son of God (Allah)?
(112:1 – 4):
1:Say (O Muhammad (PBUH)): “He is Allah, (the) One.
2:(Allah the self-Sufficient Master, Whom all creatures need, (He neither eats nor drinks).
3:He begets not, nor was He begotten.
4:And there is none co-equal or comparable unto Him.

6) How could you be secure?
(6:82)
It is those who believe (in the Oneness of Allah and worship none but Him Alone) and confuse not their belief with Zulm (wrong i.e. by worshipping others beside Allah), for them (only) there is security and they are the guided.

By: Mohammed Yahya Al-Toom
From his book: You Ask and the Quran Answers