Full upgrade questions

[dys0n]

I have a Scott MTB from i believe 2007 with v-brakes, it was a basic model. It's been skipping gears, not going into gears, making strange noises for some time now, so i've been looking into buying a new bike or upgrading.

I can get my hands on a full Shimano Deore kit which includes:

BL-M595 Hydraulic brake lever
SL-M590 Shift lever
FD-M590 Front Derailleur
RD-M592 Rear Derailleur
FC-M590 Crank, 22-32-44T, 175mm
BR-M595 Disc brake Caliper
BH59 Hydraulic tube
HG-73 Chain (112)
HB-M595 hubs 32H
CS-HG50-9 Cassette (11-32/34T)
SM-RT62 Disc centerlock (160mm)

I can get this for £300/$500 or alternatively i can get a new scott bike with lower specification parts for £450/$700.

Would these parts fit onto my bike do i need to worry about different sizes?

Is it worth upgrading?

How easy is it to perform a full upgrade because i would be looking to it myself if it's easy enough.

thanks.

[nfmisso]

If your bike does not currently have disc brakes, fitting disc brakes may be difficult and very expensive.

To solve the skipping gears issue; it may just require a simple derailleur adjustment.

At most to solve the skipping gears issue; it would take a new rear derailleur, new cable, new cassette and new chain.

Worth upgrading - no.

Cables, cassettes and chains are wear items like tires.

Rear derailleurs are not expensive.