Hello dear LoLo, wish you're doing fine 
1. is correct
2. في يوم من الأيام، كان هناك رجل ثري جدًأ، أخذ ابنه في رحلة إلى بلد فقير، ليري ابنه كيف يعيش الفقراء
One day, there was a very rich/wealthy man, who took his son on a trip to a poor country, to show him (to show his son) how poor lives.
3. لقد أمضوا أياما وليالي في مزرعة تعيش فيها أسرة فقيرة....
They have spent days and nights in a farm/household, where a poor family lived.
5. ...... وهم لديهم جدول ليس له نهاية
… And we have a water pond in the middle of our garden and their brook has no ending.
6. لقد جلبنا الفوانيس لنضيء حديقتنا
…We have brought lanterns to illuminate/ lighten our garden and they have the stars shining in sky.
باحة بيتنا تنتهي عند الحديقة الأمامية
Our courtyard ends at the front of the garden and they have the extent of the horizon.
لدينا مساحة صغيرة نعيش عليها، وعندهم مساحات تتجازو تلك الحقول
We have a small patch/ area to live on and they have areas beyond the fields.
7. لدينا خدم يقومون على خدمتنا
We have servants to serve us and they are serving each other.
8. عندها أردف الطفل قائلا:
شكرًا يا أبي لانك أريتني كيف أننا فقراء
Then child added/said further
- Thank you father for showing me how we are poor
9. تجعلك ممتنا أن تشكر الله تعالى
makes you gratefull, and thank God....
last one...
انشرها لأصدقائك لكي تساعدهم كي يغيروا نظرتهم للأشياء من حولهم، ويردوا المنة لصاحبها (عز وجل)ز
Forward it to your friend, to help them to change the way they look to things around them, and to thank goods to its owner (God) (I'm sorry I can't translate عز وجل may be dear cici can help with it, but it's generally words that follow the name of God (الله) to be more polite and respectful when talking about Allah).
يرد المنة: to pay beck grace
لا يَشْكُرُ الله مَنْ لا يَشْكُرُ النَّاس
The One Who Doesn't Thank Others, Doesn't Thank God