You cannot build Veteran or Elite formations, the only way to get them is to train an existing unit. This applies to Warships aswell, and veterancy cannot be traded between units/warships.
Okay, so here is an example of building a Cluster:
1 Assault Mech Trinary(3 FP)
2 Heavy Mech Binaries(3.5 FP)
1 Light Mech Trinary(1.5 FP)
1 Clan BA Trinary(.5 FP)
Total FP strength: 8.5
So, it would cost 8.5 FP to build this Cluster. There's a nice little table in the rules that breaks this all down, by Tech Level, Weight Class, AND Formation. This Cluster would be Regular, because its just been built. If it gets into combat and survives(ie isn't reduced to 0 FP), it can be Trained to Veteran within 6 turns. Once it has become Veteran, if it survives 3 combats within a 6 turn time frame, it can be trained to Elite. Nothing can currently be trained higher than Elite.
A LFB Warship:
Aegis(Clan) is 11.75 FP. Because it has an LF Battery, it costs FPx10 to construct the warship(that's RP AND Construction Capacity). So to build that Aegis, you need 117.5RP, AND 118 Shipyard Capacity(118/3= 40 SYs to build in one turn, or multiple turns). If you added 10 FP of dropships and ASF to that warship, it would cost an additional 100rp + SY capacity(all FP marked as LFB Mobile has its costs multiplied by 10). You don't pay the multiplier on repairs to the warship itself. The ASF, once destroyed, must be replaced, and so those still incur the multiplier to replace.
A non-LFB Warship:
Mjolnir is 18.75 FP. No LFB, so it costs FPx6 to construct the warship. Mjolnirs therefore cost me 112.5 RP and SY Capacity. As before, adding ASF/Dropships incurs the x6 multiplier.
A Newgrange(because Marlin had the question before):
Because the Newgrange is essentially a SY inside of a Warship hull, you take the FP of the Newgrange itself(1.75 FP) + the SY cost(48) and multiply it by 6(non-LFB). 1.75 + 48= 49.75 * 6= 298.5fp to construct a Newgrange. ASF/Dropships added to a Newgrange follow the usual x6 cost to build and replace.
Its the exact same construction rules as 62, nothing has changed.