How much money can I put into an IRA at any one time?

No.

You are limited to $5500/$6500 per year depending upon your age.

However, there are higher limits for things like SIMPLE plans and SEPIRAs if you are self-employed.

IRA accounts have annual contribution limits.

If you are under 50 years old, you can contribute $5500 in one year.
If you are over 50 years old, you can contribute $6500 in one year.

There's no rule against putting it in all at once, so the max you could put in at any one time would be the annual maximum ($5500 or $6500), if you made no other contributions that year.

There is also a rule that says you cannot contribute more than you earned that year, so if your income is lower than the limit, then your contribution limit is reduced.

You can also contribute to a spouse's IRA, so if you are married you can fund both your own account and your spouse's account up to the annual maximum based on your ages, effectively allowing you to contribute twice as much.

If you have that much money to waste, try your bank about a Trust fund.

2017 and 2018 Traditional & Roth IRA contribution limits. Total annual contributions to your Traditional and Roth IRAs combined cannot exceed: $5,500 (under age 50) $6,500 (age 50 or older)

No. You are limited to $6000 per year, $6500 if you're over 50. You can make the same contribution for your spouse if they don't have a retirement plan at work.