Intel Core i5 6400 - RM 828
MSI B150M Bazooka D4 - RM 399
Corsair 8GB DDR4 2133MHz Value RAM - RM 200
Zotac GTX970 4GB GDDR5 Reference - RM 1399
Kingston HyperX Fury 120GB SSD - RM 229
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 189
Bitfenix Nova - RM 149
BenQ GW2270 - RM 439

Total: RM 4047 (ETech price inclusive of GST)

If you plan to get a more decent PSU, drop the SSD and upgrade the PSU to Seasonic M12II EVO 620W at RM 409.

Yep you can.

If you aren't going for heavy oc on CPU and RAM, then sub-RM 600+/- with 6 power phases design is enough, if you are going to oc to the limit as well as getting a high frequency RAM (> 2133MHz), get those sub-RM 750 and above with 8/10 power phases design.
Just minor changes, it won't affect the build much.

What makes you think of getting an oc setup?

If your workload is low and mainly on gaming, then get the i7 6700 with B150 board, oc won't give you significant performance improvements, while the i7 which is having 4 extra threads is more future proof and is able to give the i5 a big slap when the game is utilizing the hyperthreading technology 

Don't forget, you need to spend extra money on a decent CPU cooler too if you go for 6600K (it doesn't come with any cooler), not to mention you need to spend time and have patience to test the oc settings too so your PC won't crash during gaming/operation.

Intel Core i7 6700 - RM 1318
Gigabyte H170-HD3 (D4) - RM 486
Kingston 8GB DDR4 2133MHz Value RAM - RM 196
MSI GTX970 4GB GDDR5 Tiger - RM 1535
Kingston HyperX Fury 240GB SSD - RM 405
WD Blue 1TB HDD - RM 215
Seasonic M12II EVO 620W - RM 363
NZXT S340 - RM 320

Total: RM 4838 (ETech price inclusive of GST)

What game you are planning to play? I am asking this because once you fit a Skylake i5 in your budget then you will have to sacrifice on the GPU part, if the game you intend to play isn't CPU demanding then go for i3 build.

And you don't have any hardware to reuse, does this include monitor? If yes then Skylake i5 build is not possible 

Intel Core i5 4460 - RM 792
ASRock H81M-VG4 - RM 202
Kingston 8GB DDR3 1600MHz Value RAM - RM 159
Zotac GTX960 2GB GDDR5 ZT-90302-10M - RM 869
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 188
Bitfenix Nova - RM 149

Total: RM 2574 (ETech price inclusive of GST)

Over budget a bit, hope your friend is ok with this. I am using the lowest end mobo already, it is very hard to squeeze in i5 + GTX960 for gaming purpose under 2.5k now.

Intel Core i5 4460 - RM 792
ASRock H81M-VG4 - RM 202
Kingston 8GB DDR3 1600MHz Value RAM - RM 159
Zotac GTX960 2GB GDDR5 ZT-90302-10M - RM 869
WD Blue 1TB HDD - RM 215
FSP Hexa+ 550W - RM 188
Bitfenix Nova - RM 149

Total: RM 2574 (ETech price inclusive of GST)

Over budget a bit, hope your friend is ok with this. I am using the lowest end mobo already, it is very hard to squeeze in i5 + GTX960 for gaming purpose under 2.5k now.