Alright so i browse through multiple forum and read some reviews.
Bold hardware is important
CPU: Intel Pentium G4560
MOBO: Gigabyte H110M-WW
RAM: GSKill AEGIS 8GB DDR4 2133mhz
GPU: Gigabyte GTX1050TI 4GB DDR5
Case: EsuperCase with 450W PSU
SSD: Intel 540S 120GB SSD
1) As a starter, can this spec do good in mining? Not looking for huge profit, just wanted to learn up something
If you are building a pc for regular use, and want to look at mining using it, then yes these components are fine. If you are buliding a pc specifically for mining then you have selected all the wrong components.
2) Other than the hardware in bold text, what should i take note?
The motherboard is the most important component, and you need one that can support multiple PCIe cards. The board you have selected can run a maximum of two, and you would need a powered riser to get the 2nd card running. See if you can get the Biostar TB250 or one of the several Z170 options mentioned in these forums.
Then for mining you need to get cards that ROI fast, so something like a 4GB RX 470. The 1050Ti is not nearly as good at crypto. You can not do a mining rig ina regular case. You need a higher capacity power supply, assume 150W per GPU. The Intel SSD is waaay to expensive to justify its place in a mining system.
3) Do i need water cooling for this set up if i wanted to run 24/7?
No.
4) If i wanted to add 2 more Rx480 4GB, an upgrade to 750W PSU Is enough for that? And if i do this, what i should take note?
Yes, a 750W PSU is enough for upto 4 GPU's. But the RX 480 4GB is poor value, the RX 470 4GB or RX 480 8GB are really the only two good options