I would imagine that, if you're a mac user, then GarageBand or logic would fit the bill.
If you're pc, cubase,protocols , cakewalk etc.Other bchatters will advise.
In the software I mentioned, many loops are included.
There are many bass fx , that do synths noises also.Some good, some bad...some expensive...
I used to have an aligator amp, which was a keyboard /drum amp.
Other bchatters will advise on amps also.
I haven't done anything for y onks , and am thinking of doing some similar stuff myself.
May start today, once my hangover goes.)