I bought some BTC a few years ago and they've sat in an old Bitcoin-qt wallet (0.8.5) on a USB drive ever since. I'm hoping to transfer them out into Coinbase or something similar, but none of my transactions seem to be entering the mempool. On the wallet, they appear as having left but have been stuck at 0 confirmations for over a week, but if I look the transaction ids up on blockchain.info (9def5314cd193eb375634fbbddb2ff07bb5db9710311b1afe4b0c531db949b57 and 10239862eb947b6194920045423ac1a1e75c8a9bb7bbd0e87b4c8676a2656457), it says they don't exist, which makes me think that they've not actually gone into the mempool.
The first transaction had no fee associated with it (don't hate on me - I've not actually sent any BTC before, and this was the default on my wallet), which is what I assumed the problem was. But when I tried again it should have had plenty to get confirmation quickly. I've tried using the getrawtransaction command from the console to get the hex and broadcast it using /pushtx: for the first transaction, it says the minimum relay fee wasn't met (fair enough), but for the second it returns "Missing parents for [txid #2 (with fee)] while inserting [txid #1 (without fee)]". This means very little to me. If I check my wallet address on blockchain.info it still has the original sum associated with it.
Apologies if this has been asked before (I have been looking for over a week and haven't found it if so!), but I'm at my wits end and could use some help. I'd be very happy to make a donation to anyone who can help me unlock my BTC as a token of my gratitude.
Thanks in advance!