hello!
you have several options from via tolosana to
camino frances:
1. leaving via tolosana in oloron and going to via podiensis in navarrenx then from there to SJPP via aroue and ostabat (should be well waymarked)
2. leaving via tolosana in oloron and going W on via piemont via mauloen and st just ibarre to SJPP (should be well waymarked)
3. leaving via tolosana in borce and going W on GR10 via lescun, arrete st pierre, chalets d'iraty to SJPP (should be well waymarked)
4. leaving camino aragones in any village between monreal and tiebas and somehow making your way to pamplona to connect with
camino frances and going backwards to SJPP (not waymarked as far as I know altough GR21 ruta ignaciana should run somewhere here)
5. leaving camino aragones in yarnoz, connecting with GR220 vuelta a la cuenca de pamplona on the top of the mountain above cemborain then following it N to ardanatz and from there make your way to huarte or pamplona on
camino frances and backtrack to SJPP (GR220 should be waymarked)
6. completing all of camino aragones to obanos or puente la reina and following
camino frances backwards via pamplona to SJPP (well waymarked)
from SJPP the best option to connect with camino norte is GR10 via st etienne bigorry, bidarray, ainhoa to hendaye, camino norte starts just over the border in irun.
http://www.aucoeurduchemin.org/spip/-St-Jean-Pied-de-Port-Irun-.html
for via tolosana, camino aragones,
camino frances and via piemont I think you don't need any maps. the waymarking is good. I know the first three from personal experience, but not (yet) via piemont. I don't know for GR10 but I presume the waymarking is at least good enough, although it passes through more isolated mountain areas.
other useful sites:
http://vppyr.free.fr/
http://www.webcompostella.com/
also check posts on this forum under camino aragones, via arles, via piemont.
good luck with choosing!