Welcome to the forum!
First auction:
For starters on the first auction, the Samovar is a great buy if you can get it for under $50. The inkwell set is also a great buy if you can get it for $25 or under. The Nippon tea set is a good deal for $20 as well. All three German steins are great deals if you can get them for under $30. The victorian era maritime print is perfect for $50. I'd place a $20 bid on the bed warmer. Both violins are pretty valuable, I'd buy them for $40 a piece. The raccoon coat is a GREAT purchase. At least a $30 bid. Everything else in a frame I'd bid $25 a piece on (some I would bid more, esp. the natural scenes- and def. the dutch print, but I don't know how much you want to spend). The amberina glass is a good buy at $10 a piece. Get all the hobnail if you can at $5 a piece. Most any vase and the decanter can be be sold for $15 a piece at least.
Second auction:
The silver certificate is a good buy at $15. I would place a $30 bid on the sterling knifes. I would bid at least $5 a piece for EVERY bill/coin on the list. They could all be sold on ebay for much, much more. If you can buy the morgan dollars for $10 a piece, then by all means do it. That's a good price.
Third auction:
Every clock in the auction is at least a $15 bid. The two lamps with the cranes are $15 bids. The small box next to the weird devil head is a &4 bid probably. The candlestick holders are a $20 bid, as are the lot of perfume bottles. Ignore the chandelier for eBay. The sword is at least a $30 bid. $20 for the crystal above the sword. The mirrors are good at $10 a piece. The table is a $30 bid (worth more, but shipping hurts when it comes to eBay. Perhaps craigslist). The pictures of the Victorian girls is a $20 bid. The chinese lamp is good at $25, but sell without shade. The compass is a $15 bid. The clarinet is good at $15. The tray of silver is a $50 bid if it is all sterling. The first lot of bottles is a $30 bid, the second $15? I know you said you had a small vehicle, but the gate leg table (the ovular one with the intricate feet and rails) is a $300 table. If you can get it for $30 I would. The buttons are good at $15, ESP the lot with the Jackson button and the LB election button. The glass pitcher a few rows down is good at $10. The two glass lots below the pitcher are $20 for the first and $15 for the second (not including the ceramic lot).
I skipped a few that were potential buys that I'm not entirely sure of. Hopefully the latter suggestions will be helpful, and always try to bid as low as possible obviously. I wish you luck! You can make some money on those auctions!
-Lux