#6
It's very close to a Synth Brass sound. On my Yamaha keyboard there's a voice called 80's Brass Synth and that sounds pretty much like Jump.

Hope that helps!
BASSES

Yamaha RBX270L Custom Fretless
Traben Tribal Sun 5 L
Fender Custom Jazz Bass L

EFFECTS

BOSS DD-7
BOSS OC-3
BOSS RC-2
BOSS TU-2
Tech 21 Sans Amp Bass Driver DI

AMP

Yorkville XM200 Combo
#7
From Wikipedia:

The song breaks the mould of earlier Van Halen songs, mainly in its rolling synth line (played on an Oberheim OB-Xa),


Seriously, it's not that hard.
According to BS statistics, 92% of teens have moved on to rap. If you're among the 8% who doesn't consider rap to be real music, donate your brains, as you clearly aren't using them.