They take regular lighter fluid - looking at the website the Juno was made in 1950 and good condition can be 50-100 dollars now. I think they will both need flint which you can get at any smoke shop.
(R) RONSON JUNO U.S. PATENTS RE. 19,023 2,002,845 - D 154,929. OTHER U.S. & FOR PATS. PDG. NEWARK, N.J. U.S.A.
Scarcity: uncommon–rare
Value for good–mint condition: $55.00–100.00 (approx €40.00–75.00)
Weight: 390 grams (0,86 pounds)
Dimensions: height: 16.0 cm (6.3") width: 5.2 cm (2.0") depth: 5.2 cm (2.0")
------------------------------------ RONSON U.S.PAT.RE. NO.19,023. ART METAL.WKS.INC NEWARK, N.J.U.S.A. US Patent No 19,023 Art Metal Work Inc.Newark USA