Prices for the items requested by you are :
Pioneer 3290UB - Rs. 8990/-
Pioneer 4290SD - Rs. 9990/-
JBL GTO 608C - Rs. 6990/-
JBL GT5 – S644 - Rs. 8990/-
JBL Wiring kit - No idea .. there were hell lot of duplicates/fake wiring kits bearing JBL name out in market. I would personally prefer Scosche / Tsunami / Audison cables for amp wiring.
Note: The prices mentioned are just MRPs; the actual market rates vary

For RCA, I personally use CoNection Audison or Schosche or Monster cables. I would glab recommend them for quality installation.
Overall I would say all your remaining audio items are just good enough. When you use JBL GTO 608C, you won't require Pioneer TS- S20. Using the tweeters without the external crossover will not yield good sound; infact the SQ deteriorates, as your tweeters will be fed the frequencies that it can't reproduce.
Better performance of woofer depends on the enclosure. Use sealed enclosure for tight bass or use vented one for deep bass. Remember that, your enclosure needs to be matching the parameters of the sub. You already have a monobloc; nothing like it for sub powering.