1. What is the legal standing of the family arrangement document? How can I use it for title transfer or civil suit?
Since the family arrangement deed was not registered it may not be valid and unenforceable.
However since your grandfather is no more and your father is also not living, as a legal heir of your father, you can file a partition suit seeking partition and an equal share of your father in his father's property with separate possession.
The court will decide
2. The family arrangement document has mentioned that my uncle is giving up their land rights for me and instead they will get land from my grandfather, Can they legally claim their land?
Now since your uncles have decided not to give any share in ht eroperty as well not to cooperate with you, the next best option is for partition suit. Do not go by the family arrangement anymore instead claim a share out of the entire properties.
3. Is there any legal advantage for me, being sole care taker and beneficiary of the land which has my uncle's title since 2003?
There can be no legal advantage on the basis of care taker, instead you can claim your father's share in the property.
4. Any related citations will be appreciated.
What type of citation do you require, you may look for one by browsing the internet.