I second the tomme tipper cups (with handles and fold down spout) they are amazing! Do not bother with other brands! Buy at least 2/3 as they tend to walk around the house/car/buggy and be dropped random places out and about!
The tomme tippee bowl which locks onto the clippable suction thingy is really good, but you won't need those until your little one is feeding themselves, it's the only bowl the little ones I've looked after haven't been able to knock over or pull off! And the weaning storage tubs with the screw on pale blue lids (can't remember the brand) are really good as they're a decent size to use when the child is older for food to take out and about. The tiny pots you often find for weaning will be out of action long before then.
Hand blender a must! I wouldn't bother with something for the floor as you then have to somehow wash a giant piece of plastic... Rather than just wiping/brushing a floor.
Buy bibs which are plasticy fabric (I think it's ikea which are amazing!) only get ones which cover arms too, anything less just isn't worth it. Try to avoid fabric bibs, they take too long to dry whereas the plastic fabric ones can just get dunked in a hot soapy sink of water. Food can slide off easily sometimes but most should have a food catching pouch at the bottom. If you have a water dribbler baby you can double bib with a plastic all arm covering bib and a regular fabric bib which goes around the neck only, over the top, it works a treat! Buy at least 2 arm covering bibs to allow for drying time through the day, and try and have somewhere they can dry between meals.
Probably very obvious but don't worry about trying to put food on a plate onto a high chair tray. You're likely to end up fighting the whole plate of food going on the move all at once! Putting food straight onto the tray limits the amount which can be thrown per second- giving you more time to grab the rest before it hits the floor! (Hense the suction bowl, bowl option!!)
Finally, the ikea high hair, oh so popular and a favourite of a significant of families I've worked for- it's ever so cheap, easy to clean and smallish. But I've never been a fan, totally parental preference of course but I've had many little ones spend hours a day in high chairs for various meals- I don't know about you but if I was sitting in one chair for hours a day I'd want a little padding at least... The Ikea chairs are just hard moulded plastic, I might be being precious but I think that for the amount of time spent in them over the days, months and years- they should have something more comfortable and cushioned
Wow! Sorry it's so long!